This report reviews the status of energy efficiency and renewable energy legislation introduced during the 109th Congress. Action in the second session has focused on appropriations bills; the first session focused on omnibus energy policy bill H.R. 6, H.R. 3, and several appropriations bills. For each bill listed in this report, a brief description and a summary of action are given, including references to committee hearings and reports. Also, a selected list of hearings on renewable energy is included. This report supplements the tracking of issues that appear in CRS Issue Brief IB10020 and CRS Issue Brief IB10041.

In December 2007, the parties to the United Nations Framework Convention on Climate Change (UNFCCC) held their 13th annual meeting in Bali, Indonesia, and began the process of working toward an agreement/treaty that would succeed the Kyoto Protocol to the UNFCCC when it expires in 2012. The Protocol includes a mandate for a reduction of greenhouse gas (GHG) emissions by 30 developed/industrialized nations to an average of some 5% below their 1990 levels over the commitment period 2008-2012. The broad array of these issues, briefly discussed in this report, has been described by some as comprising perhaps the most complex negotiations ever undertaken internationally.

Climate change and greenhouse gas (GHG) emissions have been an issue in the 108th Congress, as they have been over the past decade. Bills directly addressing climate change issues range from those focused primarily on climate change research (H.R. 1578 and S. 1164) to comprehensive emissions cap and trading programs for all six greenhouse gases (S. 139 and H.R. 4067). This report briefly discusses basic concepts on which these bills are based, and compares major provisions of the bills in each of the following categories: climate change research, GHG reporting and registries, and cap and trade programs.