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Environmental Ecology


a widespread and long-lasting shortage of food that may cause starvation


the results in the body of poor nutrition; undernutrition, overnutrition, or any nutrient deficiency


the usual food and drink consumed by an organism (person or animal)


the amount of food that can be produced in a given area

arable land

land that can be used to grow crops


the surface layer of soil which usually has organic matter


the movement of rock and soil by wind and water


the gradual transformation of habitable land into desert


mixture of decaying organic matter used as fertilizer


A process in which mineral salts accumulate in the soil, killing plants; occurs when soils in dry climates are irrigated profusely


a chemical used to kill pests (as rodents or insects)

biological pest control

The use of certain organisms by humans to eliminate or control pests.

genetic engineering

a science of manipulating the genes of living things to instill some desirable trait not present in the original organism. An example is a tomato given a gene to delay its rotting.


brought under human control; tamed or cultivated


catching or removing from a population more organisms than the population can replace


the raising of aquatic organisms for human consumption


domesticated animals


any of various cud-chewing hoofed mammals having a stomach divided into four (occasionally three) compartments

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