current research in food science

Articles on Food science

Displaying 1 - 20 of 62 articles.

If you’re worried about inflammation, stop stressing about seed oils and focus on the basics

Lauren Ball , The University of Queensland and Emily Burch , Southern Cross University

Run out of butter or eggs? Here’s the science behind substitute ingredients

Paulomi (Polly) Burey , University of Southern Queensland

Nigeria’s popular wara cheese has a short shelf life: we’ve found a way to keep it fresh for longer

Malomo Adekunbi Adetola , Obafemi Awolowo University

How active are the microorganisms in your yogurt? We created a new tool to study probiotic activity — and made it out of cardboard

Carlos D. Garcia , Clemson University and George Chumanov , Clemson University

Nonalcoholic beer: New techniques craft flavorful brews without the buzz

Clark Da​nderson , Auburn University

How is decaf coffee made? And is it really caffeine-free ?

Rancid food smells and tastes gross − AI tools may help scientists prevent that spoilage

Carlos D. Garcia , Clemson University and Lucas de Brito Ayres , Clemson University

Calories and kilojoules: how do we know the energy content of food, and how accurate are the labels?

Lauren Ball , The University of Queensland ; Emily Burch , Southern Cross University , and Katelyn Barnes , The University of Queensland

How does ice cream work? A chemist explains why you can’t just freeze cream and expect results

Nathan Kilah , University of Tasmania

Do you need to wash rice before cooking? Here’s the science

Evangeline Mantzioris , University of South Australia

How does food get contaminated? The unsafe habits that kill more than 400,000 people a year

Antonina Mutoro , African Population and Health Research Center

Here’s why your freezer smells so bad – and what you can do about it

Enzo Palombo , Swinburne University of Technology and Rosalie Hocking , Swinburne University of Technology

Easter bunnies, cacao beans and pollinating bugs: A basket of 6 essential reads about chocolate

Maggie Villiger , The Conversation

Pancakes won’t turn you into a zombie as in HBO’s ‘The Last of Us,’ but fungi in flour have been making people sick for a long time

Sheryl Barringer , The Ohio State University

8 everyday foods you might not realise are ultra processed – and how to spot them

Sarah Dickie , Deakin University ; Julie Woods , Deakin University ; Mark Lawrence , Deakin University , and Priscila Machado , Deakin University

Nope, coffee won’t give you extra energy. It’ll just borrow a bit that you’ll pay for later

Emma Beckett , University of Newcastle

How science and innovation can strengthen global food systems

Chibuike Udenigwe , L’Université d’Ottawa/University of Ottawa

Is Veganuary bad for you? A nutritionist explains why plant-based diets need proper planning

Hazel Flight , Edge Hill University

Why you can probably keep milk longer than you think (and why you should)

Cath Rees , University of Nottingham

What’s the difference between sugar, other natural sweeteners and artificial sweeteners? A food chemist explains sweet science

Kristine Nolin , University of Richmond

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• Food and nutrition
• Food chemistry
• Food safety
• Kitchen science

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Lecturer, Southern Cross University

Professor of Community Health and Wellbeing, The University of Queensland

Adjunct Senior Lecturer, Nutrition, Dietetics & Food Innovation - School of Health Sciences, UNSW Sydney

Professor of Chemistry, Clemson University

Professor of Food Science and Technology, The Ohio State University

Associate Professor of Chemistry, University of Richmond

Lead for Evidence-Based Medicine and Nutrition, Aston Medical School, Aston University

Professor of Medicine, Monash University

Associate Professor of Hospitality Management, Colorado State University

Professor of Food Science, Clemson University

Research Associate, Centre for Culinary Innovation, Northern Alberta Institute of Technology

Senior Lecturer in Chemistry, University of Birmingham

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Review article, insight on current advances in food science and technology for feeding the world population.

• 1 Department of Food and Nutrition, University of Helsinki, Helsinki, Finland
• 2 Helsinki Institute of Sustainability Science, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland

While the world population is steadily increasing, the capacity of Earth to renew its resources is continuously declining. Consequently, the bioresources required for food production are diminishing and new approaches are needed to feed the current and future global population. In the last decades, scientists have developed novel strategies to reduce food loss and waste, improve food production, and find new ingredients, design and build new food structures, and introduce digitalization in the food system. In this work, we provide a general overview on circular economy, alternative technologies for food production such as cellular agriculture, and new sources of ingredients like microalgae, insects, and wood-derived fibers. We present a summary of the whole process of food design using creative problem-solving that fosters food innovation, and digitalization in the food sector such as artificial intelligence, augmented and virtual reality, and blockchain technology. Finally, we briefly discuss the effect of COVID-19 on the food system. This review has been written for a broad audience, covering a wide spectrum and giving insights on the most recent advances in the food science and technology area, presenting examples from both academic and industrial sides, in terms of concepts, technologies, and tools which will possibly help the world to achieve food security in the next 30 years.

Introduction

The capacity of Earth to regenerate its own resources is continuously and drastically reducing due to the exponential growth of the human population ( Ehrlich and Holdren, 1971 ; Henderson and Loreau, 2018 ). Over the last 50 years, the global human population has doubled, while the Earth overshoot day—the day on which humanity has exhausted the annual renewable bioresources of the Earth—has continuously become earlier, reaching its earliest date (July 29) in 2018 and 2019. Exceptionally, the Earth overshoot day was delayed to August 22 in 2020, due to the novel Coronavirus pandemic ( Global Footprint Network, 2020a ) ( Figure 1 ). However, this delay is the result of a pandemic disease and it is not the consequence of any long-term planned strategy, which is still required to improve the sustainability of our society. Bioresources are necessary to feed people. However, the production, including loss and waste of food account for 26% of the human ecological footprint ( Global Footprint Network, 2020b ). This is due to low efficiency in food production coupled with non-optimal waste management. By taking action and promoting sustainable behavior in the entire food chain and among consumers, the Earth overshoot day could be delayed, preserving Earth's regenerative capacity ( Moore et al., 2012 ).

Figure 1 . Earth overshoot day (blue) and global population (orange) evolution over the last 50 years.

By 2050, the population is expected to reach 9.7 billion and ensuring global food security will be a priority ( Berners-Lee et al., 2018 ). The first step toward food security is the reduction of waste and loss of food. According to the Food and Agriculture Organization (FAO), ~1.3 billion tons of food are lost/wasted in the food chain from production to retail and by consumers annually ( Wieben, 2017 ), which highlights the importance of the circular economy and consumer education. In addition, economic barriers should be addressed to give access to healthier and sustainable food to low-income consumers ( Hirvonen et al., 2020 ). However, the reduction of waste and economic barriers is not enough to reach global food security. Indeed, to feed the world population of 2050, food production should increase by 70% ( Floros et al., 2010 ). Additionally, diets should change and rely less on animal products, including more plant-, insect-, and microalgae-based products ( van Huis and Oonincx, 2017 ; Caporgno and Mathys, 2018 ; Lynch et al., 2018 ). This change is necessary as animal-based diets are less sustainable comparatively due to their demand for more natural resources, resulting in more environmental degradation ( Sabaté and Soret, 2014 ). Unfortunately, changing food production and consumption habits is not a straightforward process; it has to be efficient, sustainable, and economically feasible. New food products have to be nutritionally adequate, culturally and socially acceptable, economically accessible, as well as palatable. Moreover, new food products should aim to maintain or improve the health of consumers. Food science and technology can help address these problems by improving food production processes, including novel ingredients from more sustainable sources, and designing new highly-accepted food products.

However, the benefits of consuming novel and upgraded food products is not sufficient to obtain an effect on consumers. Indeed, the acceptability of, and demand for food varies around the world, based on, for example, geographic location, society structure, economy, personal income, religious constraints, and available technology. Food safety and nutritionally adequate foods (in terms of both macro- and micronutrients) are most important in low-income countries ( Sasson, 2012 ; Bain et al., 2013 ), whereas medium- and high-income countries prioritize foods to reduce risk of chronic disease, and functional and environmentally friendly food ( Azais-Braesco et al., 2009 ; Cencic and Chingwaru, 2010 ; Govindaraj, 2015 ). The concept of food has evolved from the amount of nutrients needed by a person to survive on a daily basis ( Floros et al., 2010 ) to a tool to prevent nutrition-related diseases (e.g., non-communicable diseases: type 2 diabetes, coronary diseases, cancer, and obesity), and to improve human physical and mental well-being ( Siró et al., 2008 ), and to slow/control aging ( Rockenfeller and Madeo, 2010 ). Therefore, the development of new food products should consider the needs and demands of consumers. In spite of this, across countries, personal income can limit the access to sufficient food for survival, let alone new and improved food products that have extra benefits.

Coupled to this complex scenario, food demand is also constrained, and affected by human psychology ( Wang et al., 2019 ). The naturally-occurring conservative and neophobic behavior of humans toward new food can lead to nutrition-related diseases due to poor dietary patterns already established during childhood ( Perry et al., 2015 ) and can lead to acceptability problems related to food containing novel ingredients such as insects in Western countries ( La Barbera et al., 2018 ). Additionally, the introduction in our diets of new food products obtained by means of novel technologies and ingredients from food waste and by-products can be undermined by low acceptability caused by human psychology ( Bhatt et al., 2018 ; Cattaneo et al., 2018 ; Siegrist and Hartmann, 2020 ). Therefore, to increase the successful integration of the solutions discussed in this paper into the diet, consumer behavior has to be considered. Finally, it should not be forgotten that food consumption is also determined by pleasure rather than just being a merely mechanical process driven by the need for calories ( Mela, 2006 ; Lowe and Butryn, 2007 ). The latter concept is particularly important when consumers are expected to change their eating habits. New food products developed using sustainable ingredients and processes should be designed to take in consideration sensorial attributes and psychological considerations, which will allow a straightforward transition to more sustainable diets.

The actions needed in the area of food to develop a sustainable society allowing the regeneration of Earth's bio-resources are several. They include changing our eating habits and dietary choices, reducing food waste and loss, preserving biodiversity, reducing the prevalence of food-related diseases, and balancing the distribution of food worldwide. To promote these actions, new ingredients and technologies are necessary ( Table 1 ).

Table 1 . Challenges/solutions matrix for the development of the food of the future using the most recent advances in food science and technology.

This review discusses the most recent advances in food science and technology that aim to ensure food security for the growing human population by developing the food of the future. We discuss (i) the circular economy, where food waste is valorized and enters back into the food production chain improving the sustainability of the food system and reduces Earth's biodiversity and resources loss; (ii) alternative technologies and sources for food production like cellular agriculture, algae, microalgae, insects, and wood-derived fibers, which use Earth's bioresources more efficiently; (iii) the design of food in terms of creative problem-solving that fosters food innovation allowing transition to more sustainable and nutritionally adequate diets without undermining their consumer acceptability; and (iv) digitalization in which artificial intelligence (AI), virtual reality (VR), and blockchain technology are used to better control and manage the food chain, and assist the development of novel ingredients and food, boosting the technological shift in the whole food system; (v) we also briefly discuss the effect of COVID-19 on the food supply chain, showing the need to develop a resilient food system.

Food Science and Technology Solutions for Global Food Security

The circular economy.

The unsustainable practice of producing and consuming materials based on the linear (take-make-dispose) economic model calls for a shift toward innovative and sustainable approaches embodied in the principles of the circular economy ( Jørgensen and Pedersen, 2018 ). In contrast to a linear economic model, where materials are produced linearly from a presumably infinite source of raw materials, the circular economy is based on closing the loop of materials and substances in the supply chain. In this model, the value of products, materials, and resources is preserved in the economy for as long as possible ( Merli et al., 2018 ).

Integrated into the food system, the circular economy offers solutions to achieve global food sustainability by minimizing food loss and waste, promoting efficient use of natural resources and mitigating biodiversity loss ( Jurgilevich et al., 2016 ), by retaining the resources within a loop, i.e., the resources are used in a cyclic process, reducing the demand for fresh raw materials in food production. This efficient use of natural resources for food in a circular economy, in turn, helps to rebuild biodiversity by preventing further conversion of natural habitats to agricultural land, which is one of the greatest contributors to biodiversity loss ( Dudley and Alexander, 2017 ).

This measure is highlighted by the fact that an enormous amount of waste is generated at various stages of the food supply chain. Food loss and waste accounts for 30% of the food produced for human consumption globally, translating into an estimated economic loss of USD 1 trillion annually ( FAO, 2019 ). Food loss and waste also takes its toll on the environment in relation to the emission of greenhouse gases associated with disposal of food waste in landfills, as well as in activities associated with the production of food such as agriculture, processing, manufacturing, transportation, storage, refrigeration, distribution, and retail ( Papargyropoulou et al., 2014 ). The various steps in the food supply chain have an embedded greenhouse gas impact, which is exacerbated when food is wasted and lost.

Addressing the challenge of minimizing food loss and waste requires proper identification of what constitutes food loss and waste. The FAO defines food loss and waste as a decrease in the quantity or quality of food along the food supply chain ( FAO, 2019 ). Food loss occurs along the food supply chain from harvest, slaughter, and up to, but not including, the retail level. Food waste, on the other hand, occurs at the retail and consumption level. From the FAO's definition, food that is converted for other uses such as animal feed, and inedible parts of foods, for example, bones, feathers, and peel, are not considered food loss or waste. The Waste and Resources Action Programme ( Quested and Johnson, 2009 ), a charity based in the UK, has defined and categorized food waste as both avoidable and unavoidable. Avoidable food waste includes food that is still considered edible but was thrown away, such as vegetables or fruits that do not pass certain standards, leftover food, and damaged stock that has not been used. Unavoidable food waste arises from food preparation or production and includes those by-products that are not edible in normal circumstances, such as vegetable and fruit peels, bones, fat, and feathers. Despite the lack of consensus on the definition of food loss and waste, the reduction in food loss and waste points in one direction and that is securing global food sustainability.

In a circular food system, the strategies for reducing food waste vary with the type of waste ( Figure 2 ). The best measure to reduce avoidable food waste is prevention, which can be integrated in the various stages of the food supply chain. Preventing overproduction, improving packaging and storage facilities, reducing food surplus by ensuring balanced food distribution, and educating consumers about proper meal planning, better understanding of best before dates, and buying food that may not pass quality control standards based on aesthetics are some preventive measures to reduce avoidable food waste ( Papargyropoulou et al., 2014 ). For unavoidable food waste, reduction can be achieved by utilizing side-stream products as raw materials for the production of new food or non-food materials. The residual waste generated, both from the processing of avoidable and unavoidable food waste, can still be treated through composting, which returns nutrients back to the soil, and used for another cycle of food production ( Jurgilevich et al., 2016 ). Indeed, in a circular food system, waste is ideally non-existent because it is used as a feedstock for another cycle, creating a system that mimics natural regeneration ( Ellen MacArthur Foundation, 2019 ).

Figure 2 . Strategies to reduce food waste in the food supply chain in a circular food system: prevention for avoidable food waste (yellow curve) and valorization for unavoidable food waste (orange curve).

The valorization of unavoidable food waste, which mostly includes by-products or side-stream materials from the food processing industries, has resulted in novel food technologies that harness the most out of food waste and add value to food waste. These novel food technologies serve as new routes to achieving a circular food system by converting food waste into new food ingredients or non-food materials. Several ongoing examples of side-stream valorization have been explored and some of the most recent technologies are presented herein and summarized in Table 2 .

Table 2 . Summary of potentially functional and nutritional food components from cheese production, meat processing, seafood processing, and plant-based food production by-products.

One of the most famous success stories of side-stream valorization is the processing of whey, the leftover liquid from cheese production. It is an environmental hazard when disposed of without treatment, having a high biological oxygen demand (BOD) value of >35,000 ppm as well as a high chemical oxygen demand (COD) value of >60,000 ppm ( Smithers, 2008 ). These high BOD and COD values can be detrimental to aquatic life where the untreated whey is disposed of, reducing the available dissolved oxygen for fish and other aquatic animals. However, whey is loaded with both lactose and proteins, and therefore in the early days cheese producers sent their whey for use as pig feed, as still occurs in some areas today. As dairy science advanced, it was discovered that lactose and whey protein have great nutritional and technological potential. Lactose and its derivatives can be separated by various filtration and crystallization methods, which can then be used in infant formula or as a feedstock for glucose and galactose production ( Smithers, 2008 ; de Souza et al., 2010 ). Whey protein has also gained popularity for use in sports performance nutrition and as an enhancer of the functional properties of food, and so has experienced a significant increase in demand, both as isolate and concentrate products ( Lagrange et al., 2015 ).

The meat-processing industry produces various by-products that can also be further processed to obtain food ingredients. The plasma fraction of animal blood, which can easily be obtained by centrifugation, contains various plasma proteins, some of which can stabilize colloidal food systems, just like whey proteins. Others, like fibrinogen and thrombin, can act as meat glue and are therefore useful to make restructured meat product. Leftover skin, bones, and connective tissues can be processed to produce gelatin, an important gelling agent, as well as short peptides that impart an umami taste and are used in flavor enhancers. However, the use of non-muscle tissue from farm animals, especially from cows, would require strict toxicology assessment to ensure safety. There is a risk of spreading transmissible spongiform encephalopathy, a deadly disease caused by prion proteins which might spread to humans through the consumption of materials derived from non-meat tissues ( Toldrá et al., 2012 ).

The by-products of the seafood industry also provide great opportunities for valorization, with several known products and many other yet to be discovered. Fish-derived gelatin from leftover fish skin and bones can be presented as a gelatin alternative for several religious groups, for whom cattle- and swine-derived gelatin products are unacceptable ( Karayannakidis and Zotos, 2016 ). Rich in carotenoid and chitin, shells of common seafood such as crabs, lobster, and prawns can be further processed to extract functional ingredients. The extracted chitin from the shells can be treated to produce chitosan, a well-known biopolymer with the potential to be used as food packaging. One can also extract the red carotenoids present in the shells, most prominently astaxanthin, which can then be used as a nutritional and technological food additive ( Kandra et al., 2012 ). The liquid side stream of the fish-canning industry also has potential as a source of bioactive lipids, such as polyunsaturated omega-3 fatty acids ( Monteiro et al., 2018 ).

The increasing demand for plant-derived functional ingredients to cater for the vegetarian and vegan market can also be complemented with ingredients isolated from plant food processing side streams. Nixtamalization, the alkaline processing of maize, produces wastewater that is highly alkaline with a high COD of 10 200–20,000 ppm but is rich in carbohydrates and polyphenols ( Gutiérrez-Uribe et al., 2010 ). Microfiltration and ultrafiltration methods are used to isolate enriched fractions of carbohydrates and polyphenols from nixtamalization wastewater, which can later be integrated into various subsequent processes ( Castro-Muñoz and Yáñez-Fernández, 2015 ). Waste from the cereal, fruit, and vegetable industry can also be fermented by microbial means to produce various pigments for food production ( Panesar et al., 2015 ). Pigment extraction can also be performed on the leftover waste of the fresh-cut salad industry, which includes leafy vegetables and fruits that are deemed to be too blemished to be sold to the customer. Aside from pigments, such waste can also be a source of natural gelling agents and bioactive compounds that can be refined for further use in the food industry ( Plazzotta et al., 2017 ). Extraction of carotenoids, flavonoids, and phenolic compounds from fruits and vegetables waste as well as from wastewater (e.g., from olive mill) can be achieved using green technologies such as supercritical carbon dioxide, ultrasound, microwave, pulsed electric fields, enzymes, membrane techniques, and resin adsorption ( Rahmanian et al., 2014 ; Saini et al., 2019 ). Additionally, waste from potato processing, such as potato peel and potato fruit juice (a by-product of potato starch production), can yield various polyphenols, alkaloids, and even protein extracts by using different refining methods ( Fritsch et al., 2017 ).

In addition to food waste, there are also other, often unexpected, sources of food ingredients. For example, while wood cannot be considered part of the food industry by itself, the extraction of emulsifier from sawdust can serve as an example of how the waste of one industrial cycle can be used as a feedstock for another industrial cycle and in effect reduce the overall wasted material ( Pitkänen et al., 2018 ). Straw from grain production, such as barley and wheat, can also be processed to extract oligosaccharides to be used as prebiotic additives into other food matrices ( Huang et al., 2017 ; Alvarez et al., 2020 ). While young bamboo shoots have been commonly used in various Asian cuisines, older bamboo leaves can also act as a source of polyphenolic antioxidants, which can be used to fortify food with bioactive compounds ( Ni et al., 2012 ; Nirmala et al., 2018 ).

Alternative Technologies and Sources for Food Production

To feed the growing population, the circular economy concept must be combined with increasing food production. However, food production has been impaired by depletion of resources, such as water and arable land, and by climate change. Projections indicate that 529,000 climate-related deaths will occur worldwide in 2050, corresponding with the predicted 3.2% reduction in global food availability (including fruits, vegetables, and red meat) caused by climate change ( Springmann et al., 2016 ). Strategies to overcome food production issues have been developed and implemented that aim to improve agricultural productivity and resource use (vertical farming and genetic modification), increase and/or tailor the nutritional value of food (genetic engineering), produce new alternatives to food and/or food ingredients (cellular cultures, insects, algae, and dietary fibers), and protect biodiversity. Such solutions have been designed to supply current and future food demand by sustainably optimizing the use of natural resources and boosting the restructuration of the food industry models ( Figure 3 ).

Figure 3 . A view of future food based on current prospects for optimizing the use of novel techniques, food sources, and nutritional ingredients.

Cellular agriculture is an emerging field with the potential to increase food productivity locally using fewer resources and optimizing the use of land. Cellular agriculture has the potential to produce various types of food with a high content of protein, lipids, and fibers. This technique can be performed with minimal or no animal involvement following two routes: tissue engineering and fermentation ( Stephens et al., 2018 ). In the tissue engineering process, cells collected from living animals are cultured using mechanical and enzymatic techniques to produce muscles to be consumed as food. In the case of the fermentation process, organic molecules are biofabricated by genetically modified bacteria, algae, or yeasts, eliminating the need for animal cells. The Solar Foods company uses the fermentation process to produce Solein, a single-cell pure protein ( https://solarfoods.fi/solein/ ). This bioprocess combines the use of water, vitamins, nutrients, carbon dioxide (CO 2 ) from air, and solar energy to grow microorganisms. After that, the protein is obtained in powder form and can be used as a food ingredient. Most of the production in cellular agriculture has been focused on animal-derived products such as beef, chicken, fish, lobster, and proteins for the production of milk and eggs ( Post, 2014 ; Stephens et al., 2018 ). Compared with traditional meat, the production of cultured meat can (i) reduce the demand for livestock products, (ii) create a novel nutrition variant for people with dietary restrictions, (iii) favor the control and design of the composition, quality, and flavor of the product, and (iv) reduce the need for land, transportation costs (it can be produced locally), waste production, and greenhouse gas emissions ( Bhat and Fayaz, 2011 ). Moreover, the controlled production of cultured meat can eliminate the presence of unwanted elements, such as saturated fat, microorganisms, hormones, and antibiotics ( Bhat and Fayaz, 2011 ). One of the most important events for cultured meat took place in a 2013 press conference in London, when cultured beef burger meat was tasted by the public for the first time ( O'Riordan et al., 2017 ). After this, cultured meat has inspired several start-ups around the world and some examples are presented in Table 3 ( Clean Meat News Australia, 2019 ).

Table 3 . Examples of start-ups producing different cultured products around the world.

However, cellular agriculture has the potential to produce more than only animal-derivative products. A recent study conducted by the VTT Technical Research Centre of Finland explored the growing of plant cell cultures from cloudberry, lingonberry, and stoneberry in a plant growth medium. The cells were described to be richer in protein, essential polyunsaturated fatty acids, sugars, and dietary fibers than berry fruits, and additionally to have a fresh odor and flavor ( Nordlund et al., 2018 ). Regarding their use, berry cells can be used to replace berry fruits in smoothies, yogurt, jam, etc. or be dried and incorporated as ingredients in several preparations (e.g., cakes, desserts, and toppings).

Insects are potentially an important source of essential nutrients such as proteins, fat (including unsaturated fatty acids), polysaccharides (including chitin), fiber, vitamins, and minerals. Edible insects are traditionally consumed in different forms (raw, steamed, roasted, smoked, fried, etc.) by populations in Africa, Central and South America, and Asia ( Duda et al., 2019 ; Melgar-Lalanne et al., 2019 ). The production of edible insects is highly efficient, yielding various generations during the year with low mortality rates and requiring only little space, such as vertical systems ( Ramos-Elorduy, 2009 ). Additionally, the cultivation of edible insects utilizes very cheap materials, usually easily found in the surrounding area. Indeed, insects can be fed by food waste and agricultural by-products not consumed by humans, which fits well in the circular bioeconomy models (section The circular economy). The introduction of insect proteins could diversify and create more sustainable dietary alternatives. However, the resistance of consumers to the ingestion of insects needs to be overcome ( La Barbera et al., 2018 ). The introduction of insects in the form of powder or flour can help solve consumer resistance ( Duda et al., 2019 ; Melgar-Lalanne et al., 2019 ). Several technologies are used to transform insect biomass into food ingredients, including drying processes (freeze-drying, oven-drying, fluidized bed drying, microwave-drying, etc.) and extraction methods (ultrasound-assisted extraction, cold atmospheric pressure plasma, and dry fractionation) ( Melgar-Lalanne et al., 2019 ). Recently, cricket powder was used for enriching pasta, resulting in a significant increase in protein, fat, and mineral content, and additionally improving its texture and appearance ( Duda et al., 2019 ). Chitin, extracted from the outer skeleton of insects, is a precursor for bioactive derivatives, such as chitosan, which presents potential to prevent and treat diseases ( Azuma et al., 2015 ; Kerch, 2015 ). Regenerated chitin has been recognized as a promising emulsifier ( Xiao et al., 2018 ), with potential applications including stabilizing yogurt, creams, ice cream, etc. Whole insects, insect powder, and food products from insects such as flavored snacks, energy bars and shakes, and candies are already commercialized around the world. However, food processing and technology is currently needed to help address consumer neophobia and meet sensory requirements ( Melgar-Lalanne et al., 2019 ).

Algae and microalgae are a source of nutrients in various Asian countries ( Priyadarshani and Rath, 2012 ; Wells et al., 2017 ; Sathasivam et al., 2019 ), that can be consumed as such (bulk material) or as an extract. The extracts consists of biomolecules that are synthesize more efficiently than plants ( Torres-Tiji et al., 2020 ). Some techniques used for improving algae and microalgae productivity and their nutritional quality are genotype selection, alteration, and improvement, and controlling growing conditions ( Torres-Tiji et al., 2020 ). Although their direct intake is more traditional (e.g., nori used in sushi preparation), in recent years the extraction of bioactive compounds from algae and microalgae for the preparation of functional food has attracted great interest. Spirulina and Chlorella are the most used microalgae species for this purpose, being recognized by the European Union for uses in food ( Zarbà et al., 2020 ). These microalgae are rich in proteins (i.e., phycocyanin), essential fatty acids (i.e., omega-3, docosahexaenoic acid, and eicosapentaenoic acid), β-glucan, vitamins from various groups (e.g., A, B, C, D2, E, and H), minerals like iodine, potassium, iron, magnesium, and calcium, antioxidants (i.e., ß-carotene), and pigments (i.e., astaxanthin) ( Priyadarshani and Rath, 2012 ; Vigani et al., 2015 ; Wells et al., 2017 ; Sathasivam et al., 2019 ). The latter molecules can be recovered using, for example, pulsed electric field, ultrasound, microwaves, and supercritical CO 2 ( Kadam et al., 2013 ; Buchmann et al., 2018 ).

Finally, in addition to proteins, lipids, and digestible carbohydrates, it is necessary to introduce fiber in to the diet. Dietary fibers include soluble (pectin and hydrocolloids) and insoluble (polysaccharides and lignin) fractions, which are usually obtained through the direct ingestion of fruits, vegetables, cereals, and grains ( McKee and Latner, 2000 ). Although appropriate dietary fiber intake leads to various health benefits, the proliferation of low fiber foods, especially in Western countries resulted in low dietary intake ( McKee and Latner, 2000 ; Anderson et al., 2009 ). This lack of consumed dietary fibers created the demand for fiber supplementation in functional foods ( McKee and Latner, 2000 ; Doyon and Labrecque, 2008 ). As additives, besides all benefits in health and well-being, dietary fibers contribute to food structure and texture formation ( Sakagami et al., 2010 ; Tolba et al., 2011 ; Jones, 2014 ; Aura and Lille, 2016 ).

Sources of dietary fibers include food crops (e.g., wheat, corn, oats, sorghum, oat, etc.), vegetables/fruits (e.g., apple and pear biomasses recovered after juicing process, orange peel and pulp, pineapple shells, etc.) ( McKee and Latner, 2000 ) and wood ( Pitkänen et al., 2018 ). The use of plant-based derivatives and waste aligns with the circular bioeconomy framework and contributes to the sustainability of the food chain.

It is worth mentioning that new and alternative sources of food and food ingredients require approval in the corresponding regulatory systems before commercialization. In Europe, safety assessment is carried out according to the novel food regulation of the European Union [Regulation (EU) 2015/2283]. Important aspects such as composition, stability, allergenicity, and toxicology should be evaluated for each new food or food ingredient ( Pitkänen et al., 2018 ). Such regulatory assessments are responsible for guaranteeing that new food and food ingredients are safe for human consumption.

Food Design

Humans are at the center of the food supply ecosystem, with diverse and dynamic expectations. To impart sustainability in food supply by utilizing novel materials and technologies discussed in the preceding chapters, the framework of food production and consumption should go beyond creating edible objects and integrate creativity to subvert neophobic characteristics of consumers and enhance acceptability of sustainable product innovations. These innovations should also consider changing consumer demographics, lifestyle and nutritional requirements. Food design is a newly practiced discipline to foster human-centric innovation in the food value chain by applying a design thinking process in every step of production to the disposal of food ( Olsen, 2015 ). The design concept utilizes the core ideas of consumer empathy, rapid prototyping, and mandate the collaboration of a multitude of sectors involved in designing food and the distribution of food to the space where we consume it ( Figure 4 ) ( Zampollo, 2020 ).

Figure 4 . Neural network graphical representation of the major disciplines (black dots) in the food design concept and their interconnections. Sub-disciplines arising through communion of ideas of some major disciplines indicated by gray dots.

The sub-discipline of food product design relates to the curation of food products from a technological perspective utilizing innovative process and structured engineering methodologies to translate consumer wishes into product properties. In the future, food producers need to shift their focus from the current conventional approach of mass production, to engineering of food products that emphasizes food structure-property-taste. Through food product design, it is possible to influence the health of consumers by regulating nutrient bioavailability, satiety, gut health, and developing feelings of well-being, as well as encompass consumer choice by modulating consumers sensorial experience. These aspects become important with the introduction of new materials and healthy alternatives where the neophobic characteristic of humans can lead to poor food choices and eating habits due to consumer prejudices or inferior sensorial experience. For example, environmental concerns related to meat substitutes were less relevant for consumers, and sensorial properties were the decisive factor ( Hoek et al., 2011 ; Weinrich, 2019 ). In this regard, food designers and chefs will have an important role in influencing sustainable and healthy eating choices by increasing the acceptability of food products, using molecular gastronomy principles. Innogusto ( www.innogusto.com ), a start-up founded in 2018, aims to develop gastronomic dishes based on meat substitutes to increase their acceptability.

To stimulate taste sensations, electric and thermal energy have been studied, referred to as “digital taste” ( Green and Nachtigal, 2015 ; Ranasinghe et al., 2019 ). For example, reducing the temperature of sweet food products can increase sweet taste adaptation and reduce sweetness intensity ( Green and Nachtigal, 2015 ). On the other hand, electric taste augmentation can modulate the perception of saltiness and sourness in unsalted and diluted food products leading to a possible reduction of salt ( Ranasinghe et al., 2019 ). Another external stimulus that can modify the sensorial experience during food consumption, is social context. In this case, interaction with other people leads to a resonance “mirror” mechanism, that allow people to tune in to the emotions of others. Indeed, positive emotions such as happiness increase the desirability and acceptability of food, contrarily to neutral and negative emotions (angriness) ( Rizzato et al., 2016 ). Also, auditory responses such as that to background music, referred to as “sonic seasoning” ( Reinoso Carvalho et al., 2016 ) have been studied in the context of desirability and overall perception of food. Noise is able to reduce the perception of sweetness and enhance the perception of an umami taste ( Yan and Dando, 2015 ). Bridging the interior design concepts with the sensory perception in a holistic food space design is an interesting opportunity to influence healthy habits and accommodate unconventional food in our daily lives.

Food packaging which falls under the Design for food sub-discipline is expected to play an integral role to tackle issues of food waste/loss. Potential solutions to food waste/loss at the consumers level can be realized by the design of resealable packages, consideration of portion size, clear labeling of “best by” and expiration dates, for example. Although a clear understanding on the interdependency of food waste and packaging design in the circular economy has not yet been established, the design of smart packaging to prolong shelf life and quality of highly perishable food like fresh vegetables, fruits, dairy, and meat products has been considered the most efficient option ( Halloran et al., 2014 ). Packaging is a strong non-verbal medium of communication between product designers and consumers which can potentially be used to favor the consumption of healthier and sustainable options ( Plasek et al., 2020 ). Packaging linguistics has shown differential effect on taste and quality perceptions ( Khan and Lee, 2020 ), whereas designs have shown to create emotional attachment to the product surpassing the effect of taste ( Gunaratne et al., 2019 ). Visual stimuli such as weight, color, size, and shape of the food containers have been linked to the overall liking of the food ( Piqueras-Fiszman and Spence, 2011 ; Harrar and Spence, 2013 ). Food was perceived to be dense with higher satiety when presented in heavy containers compared with light-weighted containers ( Piqueras-Fiszman and Spence, 2011 ).

In light of emerging techniques in food production, it is envisioned that technologies like 3D printing, at both the industrial and household level, will be widely used to design food and recycle food waste ( Gholamipour-Shirazi et al., 2020 ). Upprinting Food ( https://upprintingfood.com/ ), a start-up company, has initiated the production of snacks from waste bread using 3D printing. These initiatives will also encourage the inclusion of industrial side streams (discussed in section the circular economy) in the mainstream using novel technologies. In addition to the increasing need for healthy food, it is envisioned that the food industry will see innovation regarding personalized solutions ( Poutanen et al., 2017 ). In the latter, consumers will be at the center of the food production system, where they can choose food that supports their personal physical and mental well-being, and ethical values. Techniques such as 3D printers can be applied in smart groceries and in the home, where one can print personalized food ( Sun et al., 2015 ) inclusive of molecular gastronomy methods ( D'Angelo et al., 2016 ). A challenge will be to incorporate the food structure-property-taste factor in such systems. In a highly futuristic vision, concepts of personalized medicine are borrowed to address the diverse demands of food through personalized or “smart” food, possibly solving food-related diseases, while reducing human ecological footprint.

Digitalization

Many major challenges faced by global food production, as discussed previously and presented in Table 1 (eating habits and dietary choices, food waste and loss, biodiversity, diseases, and resource availability), can be addressed by food system digitalization. The most recent research advances aim to overcome these challenges using digitalization (summarized in Table 4 and Figure 5 ). The rapidly advancing information and communication technology (ICT) sector has enabled innovative technologies to be applied along the agri-food chain to meet the demands for safe and sustainable food production (i.e., traceability) ( Demartini et al., 2018 ; Raheem et al., 2019 ).

Table 4 . Recent research advances in digitalization solutions to overcome challenges in global food production.

Figure 5 . Digitalization solutions for the development of future food. Red area represents digitalization-enabled targets. IoT, Internet of Things; ML, Machine Learning; RFID, Radio Frequency Identification; AI, Artificial Intelligence.

An interesting part of ICT is artificial intelligence (AI). The latter is a field of computer science that allows machines, especially computer systems, to have cognitive functions like humans. These machines can learn, infer, adapt, and make decisions based on collected data ( Salah et al., 2019 ). Over the past decade, AI has changed the food industry in extensive ways by aiding crop sustainability, marketing strategies, food sales, eating habits and preferences, food design and new product development, maintaining health and safety systems, managing food waste, and predicting health problems associated with food.

Digitalization can be used to modify our perception of food and help solve unsustainable eating behaviors. It is hoped that a better insight into how the neural network in the human brain works upon seeing food can be discovered using AI in the future and can thus direct consumer preference toward healthier diets. Additionally, it can be used to assist the development of new food structures and molecules such as modeling food gelling agents (e.g., using fuzzy modeling to predict the influence of different gum-protein emulsifier concentration on mayonnaise), and the design of liquid-crystalline food (by predicting the most stable liquid crystalline phases using predictive computer simulation tool based on field theory) ( Mezzenga et al., 2006 ; Ghoush et al., 2008 ; Dalkas and Euston, 2020 ). In addition, the development of aroma profiles can be explored using AI. Electronic eyes, noses, and tongues can analyze food similarly to sensory panelists and help in the optimization of quality control in food production ( Loutfi et al., 2015 ; Nicolotti et al., 2019 ; Xu et al., 2019 ). Companies like Gastrograph AI ( https://gastrograph.com/ ) and Whisk ( https://whisk.com/ ) are using AI and natural language processing to model consumer sensory perception, predict their preferences toward food and beverage products, map the world's food ingredients, and provide specific advertisements based on consumer personalization and preferences.

With the advancement of augmented reality (AR) and virtual reality (VR), in the future, digitalization can offer obesity-related solutions, where consumers can eat healthy food while simultaneously seeing unhealthy desirable food. This possibility has been studied by Okajima et al. (2013) using an AR system to change visual food appearance in real time. In their study, the visual appearance of food can highly influence food perception in terms of taste and perceived texture.

AI also provides a major solution to food waste problems by estimating food demand quantity, predicting waste volumes, and supporting effective cleaning methods by smart waste management ( Adeogba et al., 2019 ; Calp, 2019 ; Gupta et al., 2019 ).

AI-enabled agents, Internet of Things (IoT) sensors, and blockchain technology can be combined to maximize the supply network and increase the revenue of all parties involved along the agri-food value chain ( Salah et al., 2019 ). Blockchain is a technology that can record multiple transactions from multiple parties across a complex network. Changing the records inside the blockchain requires the consensus of all parties involved, thus giving a high level of confidence in the data ( Olsen et al., 2019 ). Blockchain technology can support the traceability and transparency of the food supply chain, possibly increasing the trust of consumers, and in combination with AI, intelligent precision farming can be achieved, as illustrated in Figure 6 .

Figure 6 . Digitalization in the food supply chain: intelligent precision farming with artificial intelligence (AI) and blockchain. IoT, Internet of Things; ML, Machine Learning. Modified from Salah et al. (2019) and reproduced with permission from IEEE.

The physical flow of the food supply chain is supported by the digital flow, consisting of different interconnected digital tools. As each block is approved, it can be added to the chain of transactions, and it becomes a permanent record of the entire process. Each blockchain contains specific information about the process where it describes the crops used, equipment, process methods, batch number, conditions, shelf-time, expiration date, etc. ( Kamath, 2018 ; Kamilaris et al., 2019 ).

Traceability and transparency of the complex food supply network are continuously increasing their importance in food manufacturing management. Not only are they an effective way to control the quality and safety of food production, but they can also be effective tools to monitor the flow of resources from raw materials to the end consumer. In the future, it will be essential to recognize the bottlenecks of the entire food supply chain and redirect the food resource allocation accordingly to minimize food waste.

The digital tools reviewed here can be combined with all the solutions proposed before, enabling fast achievement of the necessary conditions for feeding the increasing world population while maintaining our natural resources.

The Effect of Novel Coronavirus Disease (COVID-19) Pandemic on the Food System

Although the strategies examined in this review can possibly help reaching food security in 2050, the entire food system has been facing a new challenge because of COVID-19 pandemic. Since December 2019, a new severe acute respiratory syndrome (SARS) caused by a novel Coronavirus started spreading worldwide from China. To contain the diffusion of the novel Coronavirus and avoid the collapse of national sanitary systems, several governments locked down entire nations. These actions had severe consequences on global economy, including the food system.

As first consequence, the lockdown changed consumer purchasing behavior. At the initial stage of the lockdown, panic-buying behavior was dominant, in which consumers were buying canned foods and stockpiling them, leading to shortage of food in several supermarkets ( Nicola et al., 2020 ). However, as the lockdown proceeded, this behavior become more moderate ( Bakalis et al., 2020 ). The problems faced by the food supply chain in assuring food availability for the entire population have risen concerns about its architecture. Indeed, as discussed by Bakalis et al. (2020) , the western world food supply chain has an architecture with a bottleneck at the supermarkets/suppliers interface where most of the food is controlled by a small number of organizations. Additionally, as noted by these authors, problems with timely packaging of basic foods (such as flour) led to their shortage. Bakalis et al. (2020) suggest that the architecture of the food system should be more local, decentralized, sustainable, and efficient. The COVID-19 pandemic highlighted the vulnerability of the food system, indicating that the aid of future automation (robotics) and AI would help to maintain an operational supply chain. Therefore, the entire food system should be rethought with a resilient and sustainable perspective, which can assure adequate, safe, and health-promoting food to all despite of unpredictable events such as COVID-19, by balancing the roles of local and global producers and involving policymakers ( Bakalis et al., 2020 ; Galanakis, 2020 ).

Another problem caused by the lockdown was food waste. Indeed, restaurants, catering services, and food producers increased their food waste due to forced closure and rupture of the food chain ( Bakalis et al., 2020 ). On the other hand, consumers become more aware of food waste and strived to reduce household food waste. Unfortunately, the positive behavior of consumers toward reducing food waste has been more driven by the COVID-19 lockdown situation rather than an awareness ( Jribi et al., 2020 ).

COVID-19 has also showed the importance of designing food products that can help boosting our immune system and avoid the diffusion of virions through the entire food chain ( Galanakis, 2020 ; Roos, 2020 ). Virions can enter the food chain during food production, handling, packing, storage, and transportation and be transmitted to consumers. This possibility is increased with minimally processed foods and animal products. Therefore, packaging and handling of minimally processed foods should be considered to reduce viral transfer while avoiding increasing waste. The survival of virions in food products can be reduced by better designing and engineering foods taking into consideration for example not only thermal inactivation of virions but also the interaction between temperature of inactivation, water activity of food, and food matrix effects ( Roos, 2020 ).

Therefore, to reach food security by 2050, besides the solutions highlighted in section (Food science and technology solutions for global food security), it is of foremost important to implement actions in the entire food system that can counteract exceptional circumstances such as the global pandemic caused by the novel Coronavirus.

Conclusions and Outlook

To achieve food security in the next 30 years while maintaining our natural bioresources, a transition from the current food system to a more efficient, healthier, equal, and consumer- and environment-centered food system is necessary. This transition, however, is complex and not straightforward. First, we need to fully transition from a linear to a circular economy where side streams and waste are valorized as new sources of food materials/ingredients, leading to more efficient use of the available bioresources. Secondly, food production has to increase. For this, vertical farming, genetic engineering, cellular agriculture, and unconventional sources of ingredients such as microalgae, insects, and wood-derived fibers can make a valid contribution by leading to a more efficient use of land, an increase in food and ingredient productivity, a shift from global to local production which reduces transportation, and the transformation of non-reusable and inedible waste into ingredients with novel functionalities. However, to obtain acceptable sustainable food using novel ingredients and technologies, the aid of food design is necessary in which conceptualization, development, and engineering in terms of food structure, appearance, functionality, and service result in food with higher appeal for consumers. To complement these solutions, digital technology offers an additional potential boost. Indeed, AI, blockchain, and VR and AR are tools which can better manage the whole food chain to guarantee quality and sustainability, assist in the development of new ingredients and structures, and change the perception of food improving acceptability, which can lead to a reduction of food-related diseases.

By cooperating on a global scale, we can envision that in the future it may be common to, for example, 3D print a steak at home using cells or plant-based proteins. The understanding of the interaction between our gastrointestinal tract and the food ingredients/structures aided by AI and biosensors might allow the 3D printed steak to be tailored in terms of nutritional value and individual preferences. The food developed in the future can possibly also self-regulate its digestibility and bioavailability of nutrients. In this context, the same foodstuff consumed by two different people would be absorbed according to the individuals' needs. In this futuristic example, the food of the future would be able to solve food-related diseases such as obesity and type 2 diabetes, while maintaining the ability of the Earth to renew its bioresources.

However, the strategies and solutions proposed here can possibly only help to achieve sustainable food supply by 2050 if they are supported and encouraged globally by common policies. Innovations in food science and technology can ensure the availability of acceptable, adequate, and nutritious food, and can help shape the behavior of consumers toward a more sustainable diet. Finally, the recent COVID-19 global pandemic has highlighted the importance of developing a resilient food system, which can cope with exceptional and unexpected situations. All these actions can possibly help in achieving food security by 2050.

Author Contributions

FV wrote abstract, sections introduction, the effect of novel Coronavirus disease (COVID-19) pandemic on the food system, and conclusions and outlook, and coordinated the writing process. MA and FA wrote section the circular economy. DM and JS wrote section alternative technologies and sources for food production. MB and JV wrote section food design. AA and EP wrote section digitalization. FV and KM revised and edited the whole manuscript. All authors have approved the final version before submission and contributed to planning the contents of the manuscript.

FV, MA, FA, and KM acknowledge the Academy of Finland for funding (FV: Project No. 316244, MA: Project No. 330617, FA: Project No. 322514, KM: Project No. 311244). DM acknowledges Tandem Forest Values for funding (TFV 2018-0016).

Conflict of Interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher's Note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

Acknowledgments

We thank JV for drawing Figures 2 – 6 , and Mr. Troy Faithfull for revising and editing the manuscript.

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CrossRef Full Text

Keywords: food loss and food waste, circular economy, food production and food security, food structure design, new ingredients, digitalization, food design

Citation: Valoppi F, Agustin M, Abik F, Morais de Carvalho D, Sithole J, Bhattarai M, Varis JJ, Arzami ANAB, Pulkkinen E and Mikkonen KS (2021) Insight on Current Advances in Food Science and Technology for Feeding the World Population. Front. Sustain. Food Syst. 5:626227. doi: 10.3389/fsufs.2021.626227

Received: 30 November 2020; Accepted: 23 September 2021; Published: 21 October 2021.

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Copyright © 2021 Valoppi, Agustin, Abik, Morais de Carvalho, Sithole, Bhattarai, Varis, Arzami, Pulkkinen and Mikkonen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) . The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Fabio Valoppi, fabio.valoppi@helsinki.fi

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The Effects of Climate Change

The effects of human-caused global warming are happening now, are irreversible for people alive today, and will worsen as long as humans add greenhouse gases to the atmosphere.

• We already see effects scientists predicted, such as the loss of sea ice, melting glaciers and ice sheets, sea level rise, and more intense heat waves.
• Scientists predict global temperature increases from human-made greenhouse gases will continue. Severe weather damage will also increase and intensify.

Earth Will Continue to Warm and the Effects Will Be Profound

Global climate change is not a future problem. Changes to Earth’s climate driven by increased human emissions of heat-trapping greenhouse gases are already having widespread effects on the environment: glaciers and ice sheets are shrinking, river and lake ice is breaking up earlier, plant and animal geographic ranges are shifting, and plants and trees are blooming sooner.

Effects that scientists had long predicted would result from global climate change are now occurring, such as sea ice loss, accelerated sea level rise, and longer, more intense heat waves.

The magnitude and rate of climate change and associated risks depend strongly on near-term mitigation and adaptation actions, and projected adverse impacts and related losses and damages escalate with every increment of global warming.

Intergovernmental Panel on Climate Change

Some changes (such as droughts, wildfires, and extreme rainfall) are happening faster than scientists previously assessed. In fact, according to the Intergovernmental Panel on Climate Change (IPCC) — the United Nations body established to assess the science related to climate change — modern humans have never before seen the observed changes in our global climate, and some of these changes are irreversible over the next hundreds to thousands of years.

Scientists have high confidence that global temperatures will continue to rise for many decades, mainly due to greenhouse gases produced by human activities.

The IPCC’s Sixth Assessment report, published in 2021, found that human emissions of heat-trapping gases have already warmed the climate by nearly 2 degrees Fahrenheit (1.1 degrees Celsius) since 1850-1900. 1 The global average temperature is expected to reach or exceed 1.5 degrees C (about 3 degrees F) within the next few decades. These changes will affect all regions of Earth.

The severity of effects caused by climate change will depend on the path of future human activities. More greenhouse gas emissions will lead to more climate extremes and widespread damaging effects across our planet. However, those future effects depend on the total amount of carbon dioxide we emit. So, if we can reduce emissions, we may avoid some of the worst effects.

The scientific evidence is unequivocal: climate change is a threat to human wellbeing and the health of the planet. Any further delay in concerted global action will miss the brief, rapidly closing window to secure a liveable future.

Here are some of the expected effects of global climate change on the United States, according to the Third and Fourth National Climate Assessment Reports:

Future effects of global climate change in the United States:

U.S. Sea Level Likely to Rise 1 to 6.6 Feet by 2100

Global sea level has risen about 8 inches (0.2 meters) since reliable record-keeping began in 1880. By 2100, scientists project that it will rise at least another foot (0.3 meters), but possibly as high as 6.6 feet (2 meters) in a high-emissions scenario. Sea level is rising because of added water from melting land ice and the expansion of seawater as it warms. Image credit: Creative Commons Attribution-Share Alike 4.0

Climate Changes Will Continue Through This Century and Beyond

Global climate is projected to continue warming over this century and beyond. Image credit: Khagani Hasanov, Creative Commons Attribution-Share Alike 3.0

Hurricanes Will Become Stronger and More Intense

Scientists project that hurricane-associated storm intensity and rainfall rates will increase as the climate continues to warm. Image credit: NASA

More Droughts and Heat Waves

Droughts in the Southwest and heat waves (periods of abnormally hot weather lasting days to weeks) are projected to become more intense, and cold waves less intense and less frequent. Image credit: NOAA

Longer Wildfire Season

Warming temperatures have extended and intensified wildfire season in the West, where long-term drought in the region has heightened the risk of fires. Scientists estimate that human-caused climate change has already doubled the area of forest burned in recent decades. By around 2050, the amount of land consumed by wildfires in Western states is projected to further increase by two to six times. Even in traditionally rainy regions like the Southeast, wildfires are projected to increase by about 30%.

Changes in Precipitation Patterns

Climate change is having an uneven effect on precipitation (rain and snow) in the United States, with some locations experiencing increased precipitation and flooding, while others suffer from drought. On average, more winter and spring precipitation is projected for the northern United States, and less for the Southwest, over this century. Image credit: Marvin Nauman/FEMA

Frost-Free Season (and Growing Season) will Lengthen

The length of the frost-free season, and the corresponding growing season, has been increasing since the 1980s, with the largest increases occurring in the western United States. Across the United States, the growing season is projected to continue to lengthen, which will affect ecosystems and agriculture.

Global Temperatures Will Continue to Rise

Summer of 2023 was Earth's hottest summer on record, 0.41 degrees Fahrenheit (F) (0.23 degrees Celsius (C)) warmer than any other summer in NASA’s record and 2.1 degrees F (1.2 C) warmer than the average summer between 1951 and 1980. Image credit: NASA

Arctic Is Very Likely to Become Ice-Free

Sea ice cover in the Arctic Ocean is expected to continue decreasing, and the Arctic Ocean will very likely become essentially ice-free in late summer if current projections hold. This change is expected to occur before mid-century.

U.S. Regional Effects

Climate change is bringing different types of challenges to each region of the country. Some of the current and future impacts are summarized below. These findings are from the Third 3 and Fourth 4 National Climate Assessment Reports, released by the U.S. Global Change Research Program .

• Northeast. Heat waves, heavy downpours, and sea level rise pose increasing challenges to many aspects of life in the Northeast. Infrastructure, agriculture, fisheries, and ecosystems will be increasingly compromised. Farmers can explore new crop options, but these adaptations are not cost- or risk-free. Moreover, adaptive capacity , which varies throughout the region, could be overwhelmed by a changing climate. Many states and cities are beginning to incorporate climate change into their planning.
• Northwest. Changes in the timing of peak flows in rivers and streams are reducing water supplies and worsening competing demands for water. Sea level rise, erosion, flooding, risks to infrastructure, and increasing ocean acidity pose major threats. Increasing wildfire incidence and severity, heat waves, insect outbreaks, and tree diseases are causing widespread forest die-off.
• Southeast. Sea level rise poses widespread and continuing threats to the region’s economy and environment. Extreme heat will affect health, energy, agriculture, and more. Decreased water availability will have economic and environmental impacts.
• Midwest. Extreme heat, heavy downpours, and flooding will affect infrastructure, health, agriculture, forestry, transportation, air and water quality, and more. Climate change will also worsen a range of risks to the Great Lakes.
• Southwest. Climate change has caused increased heat, drought, and insect outbreaks. In turn, these changes have made wildfires more numerous and severe. The warming climate has also caused a decline in water supplies, reduced agricultural yields, and triggered heat-related health impacts in cities. In coastal areas, flooding and erosion are additional concerns.

1. IPCC 2021, Climate Change 2021: The Physical Science Basis , the Working Group I contribution to the Sixth Assessment Report, Cambridge University Press, Cambridge, UK.

2. IPCC, 2013: Summary for Policymakers. In: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA.

3. USGCRP 2014, Third Climate Assessment .

4. USGCRP 2017, Fourth Climate Assessment .

Related Resources

A Degree of Difference

So, the Earth's average temperature has increased about 2 degrees Fahrenheit during the 20th century. What's the big deal?

What’s the difference between climate change and global warming?

“Global warming” refers to the long-term warming of the planet. “Climate change” encompasses global warming, but refers to the broader range of changes that are happening to our planet, including rising sea levels; shrinking mountain glaciers; accelerating ice melt in Greenland, Antarctica and the Arctic; and shifts in flower/plant blooming times.

Is it too late to prevent climate change?

Humans have caused major climate changes to happen already, and we have set in motion more changes still. However, if we stopped emitting greenhouse gases today, the rise in global temperatures would begin to flatten within a few years. Temperatures would then plateau but remain well-elevated for many, many centuries.

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The Office of New Drugs' Efforts to Expand Regulatory Science Research

CDER’s Office of New Drugs (OND) developed a research program in 2018 to centralize and enhance its regulatory science research activities. Recently, the OND Research Program (OND-RP) published its first two fiscal year annual reports, the Extramural Research Outcomes Report and the ORISE Fellowship Research Outcomes Report , which highlight the research projects that the OND-RP funded.

In this CDER Conversation, Laura Jaeger, PhD, associate director of the OND-RP, talks about the program’s important work.

Congratulations on the publication of the OND-RP’s first two reports. Can you tell me why OND started the research program?

Thank you. The reports are a celebration of how we contributed to the field of regulatory science research, which is research to help our agency make informed, evidence-based regulatory decisions. We funded a lot of impactful projects, and I am happy to share these research outcomes with the public.

Our research program was formed in 2018 to centralize and create an infrastructure for OND’s regulatory science research. Most project ideas come from OND’s scientific review staff, who evaluate a drug’s safety and efficacy profile to help decide if the treatment should be approved. OND reviewers also assess if additional measures are necessary for safe drug use or if some patient populations should not take the medication, among other regulatory decisions.

In reviewing new drug applications, OND reviewers may realize that they cannot fully assess a drug’s safety or effectiveness — and therefore cannot make an informed decision — because of knowledge gaps in our scientific understanding. Whenever OND reviewers identify a knowledge gap like this, they can reach out to us, and we work together on initiating a research project to answer this question.

How is the OND-RP funded regulatory science research different from other types of research?

Regulatory science research is much more targeted than basic scientific research, which provides fundamental knowledge about the nature and behavior of living systems. Basic scientific research asks broad questions that may take a long time to answer. The OND-RP, meanwhile, is focused on addressing specific scientific questions that will produce immediate impacts on how CDER and FDA make drug approval decisions. Because our research is so targeted, our projects are relatively short, about three to four years.

We have comparatively limited funding, so our research projects use creative methods to generate high-quality clinical or scientific information. A strategy we like to use is “data mining” of existing large data sets. For example, OND often repurposes raw data submitted in new drug applications to address questions. We also leverage electronic health records and patient registries to address clinical knowledge gaps. We hope the research produces tangible end-products that will support FDA’s mission, such as guidances for industry, internal review documents, updates to regulatory policies, and Drug Development Tools . Like most scientific researchers, we share our findings with the community through presentations and published journal articles.

What are the two main ways that the OND-RP funds research?

While our OND review staff typically identify the research question, they don’t have the bandwidth to complete the study alone. Instead, the OND-RP funds both extramural (investigators from outside FDA) and intramural (investigators from within FDA) research. That is why we published two reports — one highlighting our extramural research projects and another focused on intramural research.

On the extramural front, we use several mechanisms to fund research. These include FDA’s Broad Agency Announcement program, the agency’s Centers for Excellence in Regulatory Science and Innovation program, inter-agency agreements with other government entities, and public-private partnerships. We also use agreements such as memorandums of understanding, research collaboration agreements, and cooperative research and development agreements to formalize our research partnerships. Our external investigators provide the capabilities, expertise, or equipment to conduct extramural research. These investigators come from industry, academia, or other government agencies.

We fund intramural research primarily through the Oak Ridge Institute for Science and Education (ORISE) fellowship program . In this program, college students or recent graduates (up to five years after graduating) can conduct research with an FDA mentor on a regulatory science project. It’s a great opportunity for young investigators to get hands-on experience in regulatory science and contribute to our mission. People interested in the fellowship program can search and apply here. We regularly post new full-year ORISE fellowship opportunities.

What are examples of research projects that the OND-RP has funded?

One example from our extramural report is an effort to develop blood-based biomarkers, or molecules that signal a normal or abnormal biologic process, for traumatic brain injury. Drug development in this area is difficult because people’s symptoms vary and there are few objective ways to determine prognosis. A biomarker would help investigators sort individuals into clinical trials by disease severity, ultimately fostering drug development.

Another extramural research project focuses on the challenges in interpreting electrocardiograms (ECGs) in children, making it difficult to evaluate drugs targeting serious and life-threatening heart rhythm abnormalities. In this project, researchers are collecting real-world ECG data to better understand how to interpret readings and perform pediatric cardiac safety evaluations.

One project highlighted in our ORISE report focused on enhancing the evaluation of bulk drug substances. Compounders use these substances to create custom drugs for individual patients. For example, if a patient has an allergy to an ingredient in an FDA-approved drug, compounders can use bulk drug substances to compound a drug without the allergen. In this project, ORISE fellows helped create internal resources to streamline our review of bulk substances. This will enhance the safety of compounded drugs, which are not FDA-approved and don’t have the same safety assurances as approved drugs.

In another example, ORISE fellows contributed to the development of a list of molecular targets related to the growth or progression of pediatric cancers. This list is published on the FDA website , and it’s helping to spur discussion on initial Pediatric Study Plans (iPSPs) for more than 100 drug and biologic candidates. iPSPs are outlines of pediatric stud(ies) that drug sponsors plan to conduct to show that a drug can be used in children. This is important because if a drug will be used to treat children, FDA needs data from pediatric clinical trials to assess safety and efficacy. In oncology, some molecular targets are unlikely to be associated with the growth of pediatric cancers, meaning that studying the drug in children may not be necessary. Industry uses the lists created from this research project to inform their iPSPs for oncology drugs.

I encourage you to read our extramural and ORISE outcomes reports to learn more about our work in advancing regulatory science research. For more information about the OND’s regulatory science research, please visit Office of New Drugs Regulatory Science Research . If you have suggestions for regulatory science knowledge gaps in new drug development, send us an email at [email protected] .

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