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Ozone Holes – Page 457 Global Warming – Page 649 Acid Rain – Page 481
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Acid Rain Caused by acid SO2
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SO 2 Comes From Volcanic gases Forest fires Bacteria Industrial processes Fossil fuel combustion
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Amounts released 30 million tons of SO 2 released by U.S. yearly 15 –30 million tons released by Mt Pinatubo
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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???
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Acid Rain Chemistry
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Problems with Acid Rain Lowers the pH of rivers and lakes this kills, fish animals and plants Dissolves metals, marble and limestone
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Scrubber Chemistry If CaCO 3 is placed in the smoke stack, much of the SO 2 is removed
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