resource that can regenerate quickly and that is replaceable

using natural resources at a rate that does not deplete them

destruction of forests

mixture of chemicals that occurs as a gray-brown haze in the atmosphere

harmful material that can enter the biosphere through the land, air, or water

plants and animals that have migrated to places where they are not native

the sum total of the variety of organisms in the biosphere

increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web

splitting of ecosystems into small fragments

atmospheric layer in which 03 gas is relatively concentrated

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