Ozone Holes – Page 457 Global Warming – Page 649 Acid Rain – Page 481.

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Presentation transcript:

Ozone Holes – Page 457 Global Warming – Page 649 Acid Rain – Page 481

Acid Rain Caused by acid SO2

SO 2 Comes From Volcanic gases Forest fires Bacteria Industrial processes Fossil fuel combustion

Amounts released 30 million tons of SO 2 released by U.S. yearly 15 –30 million tons released by Mt Pinatubo

Coal is a major source of SO 2 Eastern coal is high sulfer & higher BTU’s Western coal is low sulfer & lower BTU’s Must burn more west coal to get same energy as East So which is better???

Acid Rain Chemistry

Problems with Acid Rain Lowers the pH of rivers and lakes this kills, fish animals and plants Dissolves metals, marble and limestone

Scrubber Chemistry If CaCO 3 is placed in the smoke stack, much of the SO 2 is removed