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Human Impact (Questions and Word Blanks (What harmful effect does…
Human Impact
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Pollutions and Factors
Toxic Pollution- the presence of pesticides, oil, industrial waste, household chemicals, mining waste, lead, and radioactive nuclear waste in the water.
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Biotic Factor- Some pollutants, such as sewage and runoff from farming, increase the level of nitrogen in seawater, causing an overgrowth of algae, which 'smothers' reefs by cutting off their sunlight.
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