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the development of highly productive crop strains and the use of modern agricultural techniques to increase yields of food crops
in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert
variety of habitats, living communities, and ecological processes in the living world
sum total of all the different forms of genetic information carried by all organisms living on Earth today
species whose population size is rapidly declining and will become extinct if the trend continues
increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web
wise management of natural resources, including the preservation of habitats and wildlife
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