caps on oil companies' liability for oil spills, and would have cut certain tax breaks for oil companies. In February 2011, he voted against a measure to reinstate royalties assessed for oil drilled when oil prices are high. In March, April, and May 2011, he voted against measures that would have allowed consideration of legislation to eliminate tax breaks for oil companies and promote production and use of alternative energy sources. In 2005, supported by Friends of the Earth, Paul cosponsored a bill preventing the U.S. from funding nuclear power plants in China. Paul is opposed to federal subsidies that favor certain technologies over others, such as ethanol from corn rather than sugarcane, and believes the market should decide which technologies are best and which will succeed in the end. In 2005, he advocated the repeal or temporary suspension of the federal gas tax in order to alleviate the economic effects of Hurricane Katrina. He believes that nuclear power is a clean and efficient potential alternative that could be used to power electric cars. He believes that states should be able to decide whether to allow production of hemp, which can be used in producing sustainable biofuels, and has introduced bills into Congress to allow states to decide this issue; North Dakota, particularly, has built an ethanol plant with the ability to process hemp as biofuel and its farmers have been lobbying for the right to grow hemp for years. He voted against 2004 and 2005 provisions that would shield makers from liability for MTBE, a possibly cancer-causing gasoline additive that seeped into New England groundwater. The proposal included $1.8 billion to fund cleanup and another $2 billion to fund companies' phaseout programs. The League of Conservation Voters gave Paul a pro-environment voting-record score of 6% for 2011, and 0% for 2009–2010. (The League considers a perfect score of 100% a measure of strong support for environmental protection.) Republicans for Environmental Protection (REP), whose scorecards rate only Republican lawmakers, gave Paul a score of only 5% for 2010, and 2% for 2009–2010, on a 0 – 100% scale in which a perfect score of 100% is considered by REP to be a measure of strong support for environmental protection. Republicans for Environmental Protection rated Paul "Worst in the House" on the environment of all Republican representatives in the 111th Congress (2009–2010). Health policy Health care costs Paul says that contrary