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| resource that can regenerate quickly and that is replaceable. |
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| resource that can not be replenished by natural processes |
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| using natural resources at a rate that does not deplete them |
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| wearing away of surface soil by water and wind |
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| in areas with dry climates, a process caused by a combination of poor farming practices, overgrazing, and drought that turns productive land into desert. |
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| harmful material that can enter the biosphere through land, air, or water |
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| the practice of hunting only to acquire basic necessities for survival; makes relatively few demands on the environment |
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| introduction of intensive farming practices that lead to a substantial increase in crop yields |
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| the sum total of the variety of organisms in the biosphere |
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| gray-brown mixture of chemicals that occurs as a haze in the atmosphere. |
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| rain containing nitric and sulfuric acids |
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| variety of habitats, living communities, and ecological processes in the living world |
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| number of different species in the biosphere |
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| sum total of all the different forms of genetic information carried by all organisms living on Earth today |
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| disappearance of a species from all parts of its geographical range |
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| species whose population size is rapidly declining and will become extinct if the trend continues |
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| splitting of ecosystems into small fragments |
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| plants and animals that have migrated to places where they are not native |
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| wise management of natural resources, including the preservation of habitats and wildlife |
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| increase in the average temperatures on Earth |
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| band of ozone, a gas made up of three oxygen atoms |
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