WASHINGTON, D.C. — Environmental groups sued 14 federal agencies on April 14 for failing to purchase enough alternative fuel vehicles to meet the requirements of a 1992 energy law, according to the Associated Press. The lawsuit, filed in federal court in San Francisco, alleges that nearly all agencies under President Bush have violated the U.S. Energy Policy Act, which requires that 75 percent of the new cars and light trucks they purchase run on alternative fuel, such as natural gas, ethanol, propane, or electricity. "These agencies are raising the risks of cancer, stroke and asthma for millions of Americans, increasing global warming and air pollution, and keeping the nation addicted to fossil fuels from politically unstable foreign nations," said Russell Long, vice president of the Bluewater Network, which filed the lawsuit with the Center for Biological Diversity, as quoted by the Associated Press. The Energy Policy Act sought to replace 30 percent of all oil used for U.S. transportation with alternative fuel by 2010. By requiring the federal government to purchase alternative fuel vehicles, the law aimed to stimulate that market and reduce dependence on foreign oil. It was unclear how many of the federal government's fleet of almost 600,000 cars ran on alternative fuels. The plaintiffs claim that many federal agencies have failed to report their purchases as required by law.