Unit 6: Air Section 6:Acid Precipitation

How Acid Precipitation Affects Ecosystems International Conflict and Cooperation

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Homework Questions1. What human activities contribute to

acid precipitation?

2. Why in international cooperation necessary to reduce acid precipitation?

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Vocabulary Acid Precipitation

– Highly acidic precipitation Acid Shock

– Sudden influx of acidic water caused by melting acidic snows that rush into lakes and streams, killing large numbers of fish and amphibians and affecting the offspring of others

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pH Scale

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How Acid Rain Affects Ecosystems Animals designed to live in pH range. Acid rain changes pH of lake or river. Animals and plants die.

– Aquatic plants– Fish– Animals that depend on these

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Acid Precipitation Forests, mostly

evergreens are susceptible to arid precipitation.

If the water in their roots is too acidic, they die.

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Effects Obelisk is 5000 years

old from Egypt. This obelisk is in

Central Park, New York City.– Notice the weathering.

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International Conflict Global air circulation is not limited to

national boundaries Air pollution in New England and

Canada comes from Mid-western United States.

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Helsinki Agreement Signed 1985. Cut sulfur-oxide 30% over 10 years.

– Signed by 18 nations. 1988, 27 nations signed in United

Nations Sofia Protocol which required the reduction of nitrous oxide.