natural processes cannot replenish them within a reasonable amount of time
nonrenewable resources
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what is habitat fragmentation?
Loss of habitat due to building, clearcutting, etc. that can lead to loss of biodiversity.
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Gases that trap heat in the atmosphere
greenhouse gases
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lifesaver
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a layer in the earth's stratosphere containing a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
ozone layer
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Give an example of a renewable resource
solar, water, wind, trees
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a gray-brown haze formed by chemical reactions among pollutants released into the air by industrial processes and automobile exhaust. Ozone is one product of these reactions.
smog
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How is fresh water both a renewable and a limited resource?
Water circulates in nature in numerous states of matter, including liquid, vapor, and ice. The water that evaporates returns to the earth as precipitation.
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What causes soil erosion?
Soil erosion occurs primarily when dirt is left exposed to strong winds, hard rains, and flowing water.
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baam
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occurs if a pollutant, such as DDT, mercury, or a PCB, is picked up by an organism and is not broken down or eliminated from its body. Instead, the pol- lutant collects in body tissues.
biomagnification
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loss of forests, can also have a negative effect on soil quality. Healthy forests not only provide wood, but also hold soil in place, protect the quality of fresh water supplies, absorb carbon dioxide, and help moderate local climate
deforestation
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can be produced or replaced by a healthy ecosystem