 In February 2008, he voted against the Renewable Energy and Energy Conservation Tax Act, which supporters said would have eliminated $18 billion in tax benefits for oil companies and substituted tax credits for wind, solar, and other renewable energy sources.In May 2008, he voted against the Energy Improvement and Extension Act, which supporters said contained provisions to cut tax breaks for oil companies and to expand tax breaks for alternative energies like solar and geothermal power, biodiesel fuels, and plug-in hybrid vehicles.In July 2010, he voted against the Consolidated Land, Energy, and Aquatic Resources Act of 2009, which would have removed federal caps on oil companies' liability for oil spills, and would have cut certain tax breaks for oil companies.