Chapter 4.3 - Water, Air, and Land Resources

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Last updated 10:35 PM on 9/10/26
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11 Terms

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point source pollution

pollution that comes from a specific site

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nonpoint source pollution

pollution that comes from many sources rather than from a single, specific site

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runoff

water that flows over the ground surface rather than soaking into the ground

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global climate change

A broad term that refers to changes in the earth's climate mostly as a result of changes in temperature and precipitation.

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Percentage of Earth covered with water

71%

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Percentage of water on Earth that is fresh water

3%

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Percentage of N2 in atmosphere

78%

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Percentage of O2 in atmosphere

21%

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Percentage of CO2 in atmosphere

0.04%

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Sources of air pollution

Mobile Sources, Stationary Sources, and Residential Sources

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Human activities that damage the land.

mining, agriculture, deforestation, and waste disposal