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What is acid rain?
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Evolution
Does radiation from a nuclear plant stop at the 10-mile (16 kilometer) zone?
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Evolution
What happened at Three Mile Island?
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Evolution
What is nuclear winter?
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Evolution
What caused the Bhopal disaster?
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Evolution
What is the Coriolis effect?
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Evolution
Are glaciers only found in cold, northern places?
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Evolution
What is a tropical glacier?
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Evolution
