History, 17.07.2020 17:01 lildanielmabien
Congress passed the Clean Air Act in 1970. Since this act was passed, emissions of the six main air pollutants Group of answer choices cannot be measured since Congress failed to appropriate money to monitor the level of emissions. have fallen by more than one-half. have remained essentially constant, even though significant economic growth has occurred in the United States since 1970. have increased significantly due to the growth of the U. S. economy.
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