Future energy needs hearing before the Committee on Energy and Natural Resources, United States Senate, One Hundred Tenth Congress, second session, to receive testimony on the challenges to meeting future energy needs and to developing the technologies for meeting increased global energy demand in the context of the need to address global climate change, June 25, 2008

The implications of the Supreme Court's decision regarding EPA's authorities with respect to greenhouse gases under the Clean Air Act : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, first session, April 24, 2007

Terrestrial carbon sequestration in National Parks : values for the conterminous United States

Federal efforts to reduce the cost of capturing and storing carbon dioxide

Coal a clean future : hearing before the Subcommittee on Energy, Natural Resources, and Infrastructure of the Committee on Finance, United States Senate, One Hundred Tenth Congress, first session, April 26, 2007

Legislative hearing on S. 2995 : the Clean Air Act Amendments of 2010 : joint hearing before the Subcommittee on Clean Air and Nuclear Safety and the Committee on Environment and Public Works, United States Senate, One Hundred Eleventh Congress, second session, March 4, 2010

Examining global warming issues in the power plant sector : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, first session, June 28, 2007

Regulatory impact analysis for the proposed carbon pollution guidelines for existing power plants and emission standards for modified and reconstructed power plants

Effects of a carbon tax on the economy and the environment

Regulation of greenhouse gases under the Clean Air Act : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Tenth Congress, second session, September 23, 2008