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Nutrition and the Environment

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Nutrition and the Environment A NUTRITIONFOUNDATION FOR DEVELOPMENT Nutrition and The Environment T IMOTHY J OHNS AND PABLO B. EYZAGUIRRE ENVIRONMENT Brief 5 of 12 Rapid environmental changes are nutrition knowledge becomes vital in enabling individu- profoundly altering the relationships between humans als and populations to adapt in the most positive manner and the ecosystems in which they live.These changes possible.The nutritional status of populations,as a recog- include overpopulation, loss of biological resources, nizable and measurable outcome,should help direct ecosystem destruction associated with industrial and other scientific disciplines and intervention programs in commercial development, climatic change, urbaniza- identifying sustainable solutions to the environmental tion, modern agriculture employing pesticides and other and economic problems facing global communities. inputs, and erosion of food crop diversity from years of genetic engineering focused on a few crops. The Environment-Nutrition Connection Such disruptions in environmental integrity can affect As community development priorities merge with those patterns of human health, disease, and nutritional status. of environmental conservation, it becomes increasingly In its preamble the Convention on Biodiversity recog- clear that unless human populations meet their basic nizes that “… conservation and sustainable use of survival needs they cannot afford to conserve. At the biological diversity is of critical importance for meeting same time unless local communities protect the the food, health and other needs of the growing world environments around them they have limited hope to population, for which purpose access to and sharing of thrive beyond the short term. As nutrition represents the both genetic resources and technologies are essential.” most fundamental of human needs, it provides a useful The Intergovernmental Panel on Climatic Change perspective from which to address this paradox. specifically discusses nutritional status as an outcome of climatic change in Africa. Nutrition research provides essential information on how environmental degradation can lead to major An understanding of these links offers guidance on nutrition-related health problems such as malnutrition, nutrition-relevant actions that provide sustainable infectious disease, and contamination.When people solutions to environmental changes. At a time of have reduced access to and intake of crucial unprecedented climatic and environmental change, bioresources, they may suffer from protein-energy A NUTRITIONFOUNDATION FOR DEVELOPMENT Brief 5 of 12 malnutrition and micronutrient deficien- acknowledgments that loss of biodiversity and other cies. Diabetes and coronary heart environmental changes affect diet and health are disease that reflect reduced intake of usually limited to general considerations of food nutrients and non-nutrients protecting security without attention to the complexity of nutrition- health underscore the cost of increased health relationships. reliance on processed foods or a narrow species base by industrial societies and Some research and intervention programs have focused urban populations. Major public health on providing micronutrients such as vitamin A or problems of global importance such as minerals through genetic improvement, crop diversifica- tuberculosis, gastrointestinal diseases, tion, and soil management. More attention needs to be measles, and respiratory disease all applied, however,to identifying crop varieties and minor reflect the interaction of nutritional and crops with selective nutritional assets such as micronu- environmental factors. trients, soluble fiber,or antioxidants and to analyzing the nutritional content of indigenous fruits and vegetables Environmental contamination from and wild edible species. Programs should give greater industrial and agricultural chemicals importance to maintaining the genetic diversity of plant such as heavy metals, organochlorines, species within home gardens and local agroecosystems. and radionucleotides may compromise Where they can be exploited sustainably,uncultivated people’s nutritional status and health resources can also improve nutrition indirectly by either directly or through changes in diet. contributing to economic livelihood. Herbicides and pesticides eliminate uncultivated food sources from agroe- Genetic modification and other strategies that target cosystems; other chemicals may make single nutrients promise selective improvement of plant them unfit for consumption. Persistent nutrient composition. Although genetically modified organic pollutants (POPS) transported in organisms are subject to considerable scrutiny for their the atmosphere can have adverse effects potential adverse effects on human health, this technol- on traditional food systems far removed ogy also has potential ecological and social effects that from major sites of pesticide use. require careful evaluation. While institutional approaches are essential to address ENVIRONMENT Seeking Sustainable Solutions problems of a global magnitude, national efforts, Food-based strategies are key to address- particularly those involving local communities, are also ing global hunger and malnutrition as important. Local multidisciplinary activities that well as enabling vulnerable populations combine nutrition research, ethnobotany,and ecosystem to adapt to environmental and socio- and resource management with health care activities, economic changes. and that embrace participatory models of empower- ment and initiative, offer real hope for addressing While modern technology-based farming problems at the levels where people are directly is essential for producing food for the affected. growing world population, concerns about crop quality and production Researchers have documented ways in which popula- seldom include nutrition, or if they do, tions with traditional life-styles (often populations tend to focus on protein. Similarly, identified as indigenous) satisfy their nutritional needs 2 A NUTRITIONFOUNDATION FOR DEVELOPMENT through unique human-environment relationships. Brief 5 of 12 For example, rice, pulses, and milk products provide a balance of amino acids for subsistence farmers in India. In situations where animal protein and fat are the primary energy sources, such as among Arctic hunters and dryland pastoralists, populations have adapted specialized preparation techniques and used wild plants to ensure that essential vitamins and minerals are consumed. Nutritional sciences can help determine whether these traditional systems can be adapted for use elsewhere. Coupled with knowledge about the role of nutrition in contemporary health problems, traditional knowledge and resources can guide environmental efforts to identify sustainable solutions. cultivated resources, and the sustainable use of the environments in which they are In turn, adequate nutrition increases options for located. conservation, or at least reduces pressure on people to use resources unsustainably in the effort to meet their basic needs. Suggested Reading Convention on Biodiversity.1992. Traditional values of conservation, encompassing <http://www.biodiv.org/chm/conv/ relationships to land, spiritual dimensions, and default.htm>. concepts of health, are fragile and vulnerable to modern forces of change. Nonetheless, cultural values Eyzaguirre, P. B., S. Padulosi,and T. can be important components in programs of public Hodgkin. 1999. IPGRI’s strategy for health education and ecological recovery. Integrating neglected and underutilized species and the biological, social, and cultural dimensions of the human dimension of agrobiodiversity. human-environmental relations is as essential to the In Priority-setting for underutilized and present and future sustainability of human health as it neglected plant species of the has been throughout history. Mediterranean region, ed. S. Padulosi. Rome: International Plant Genetic ENVIRONMENT Resources Institute. Conclusion Major health problems of the 21st century include nutri- FAO (Food and Agriculture Organization tional deficiencies and dietary changes in both rural of the United Nations). 1996. Global Plan and urban settings. Nutritional analyses, combined with of Action for the Conservation and an understanding of traditional systems and resources, Sustainable Utilization of Plant Genetic can help identify the biological and sociocultural Resources for Food and Agriculture. Rome. components of solutions to dietary and health problems associated with dietary change and adaptive strategies FAO/WHO (Food and Agriculture for the future.Addressing nutritional needs offers a Organization of the United Nations/World primary rationale for the preservation of traditional Health Organization). 1994. International knowledge and life-styles, the conservation of wild and Conference on Nutrition: Plan of Action 3 A NUTRITIONFOUNDATION FOR DEVELOPMENT Brief 5 of 12 for Nutrition. Ecology of Food and Pellett,P. L. 1993.The World Declaration on Nutrition from Nutrition 32: 5-31. the International Conference on Nutrition. Ecology of Food and Nutrition 30: 1-7. Johns,T.1999.The chemical ecology of human ingestive behaviors.Annual Platt,A. E. 1996. Infecting ourselves: How environmental Review of Anthropology 28: 27–50. and social disruptions trigger disease.Washington,D.C.: Worldwatch Institute. Johns,T.,and P. B. Eyzaguirre. 2001. Nutrition for sustainable environments. Tomkins,A. 2000. Malnutrition, morbidity,and mortality in SCN News 21: 24–29. children
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