EPA black carbon and global warming hearing before the Committee on Oversight and Government Reform, House of Representatives, One Hundred Tenth Congress, first session, October 18, 2007

Black carbon : a global health problem with low-cost solutions : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, first session, September 24, 2013

Coming clean : breaking America's addiction to oil and coal

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

Climate change : preparing for the energy transition : oversight hearing before the Subcommittee on Energy and Mineral Resources of the Committee on Natural Resources, U.S. House of Representatives, One Hundred Sixteenth Congress, first session, Tuesday, February 12, 2019

Unleashing America's energy and mineral potential : oversight hearing before the Committee on Natural Resources, U.S. House of Representatives, One Hundred Eighteenth Congress, first session, Wednesday, February 8, 2023

Climate change : the need to act now : hearing before the Subcommittee on Clean Air and Nuclear Safety of the Committee on Environment and Public Works, United States Senate and the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, June 18, 2014

Oversight hearing : EPA's proposed carbon pollution standards for existing power plants : hearing before the Committee on Environment and Public Works, United States Senate, One Hundred Thirteenth Congress, second session, July 23, 2014

EPA regulatory overreach : impacts on American competitiveness : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, June 4, 2015

Examining EPA's regulatory overreach : hearing before the Committee on Science, Space, and Technology, House of Representatives, One Hundred Fourteenth Congress, first session, July 9, 2015