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Congress passed the Clean Air Act in 1970. Since this act was passed, emissions of the six main air pollutants

melinoma86

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Congress passed the Clean Air Act in 1970. Since this act was passed, emissions of the six main air pollutants

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cannot be measured since Congress failed to appropriate money to monitor the level of emissions.

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have fallen by more than one-half.

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have remained essentially constant, even though significant economic growth has occurred in the United States since 1970.

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have increased significantly due to the growth of the U.S. economy.

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InMicro

Edition: 1^st

Authors: Hubbard, O'Brien

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More solutions for this book are available here

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