This report discusses the effect of human activities on global climate change. Human activities, particularly burning of fossil fuels, have increased atmospheric carbon dioxide (CO2) and other trace gases, including chlorofluorocarbons (CFCs), methane, and nitrous oxide.
The 104th Congress enacted four bills modifying provisions of the Clean Air Act (CAA) and held numerous oversight hearings, as EPA and the states continued to implement requirements of the Act's 1990 Amendments. The Amendments set deadlines for issuance of new regulations and attainment of air quality standards.
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