This report provides background and analysis on several issues related to the Clean Air Act, including: Clear Skies / Multi-Pollutant Legislation, Mercury from Power Plants, New Source Review (NSR), MTBE and Ethanol, Ozone Nonattainment Area Deadlines, and Conformity of Transportation Plans and SIPs. It also discusses the most recent developments.

Climate change and greenhouse gas (GHG) emissions are a continuing issue in the 109th Congress. Bills directly addressing climate change issues range from those focused primarily on climate change research to comprehensive emissions cap-and-trade programs. Additional bills focus on GHG reporting and registries, or on power plant emissions of carbon dioxide, as part of wider controls on pollutant emissions. The bills vary in their approaches to climate change issues. This report briefly discusses the basic concepts on which these bills are based and compares major provisions of the bills in each of the following categories: climate change research, technology deployment, GHG reporting and registries, and emissions reduction programs.

Fish and marine mammals are important resources in open ocean and nearshore coastal areas. Many laws and regulations guide the management of these resources by federal agencies. This report contains information on commercial and sport fisheries, aquaculture, and marine mammals and issues related to the 109th Congress.

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