The Bush administration engaged in a broad, multi-agency effort to lobby congressmen and governors to urge them to oppose a California plan to reduce greenhouse gas emissions, according to a recent investigation.
In December 2005, California petitioned EPA to let the state develop its own program and standards for regulating greenhouse gas emissions from vehicles. Under the Clean Air Act, the federal government holds the express right to regulate emissions but may grant waivers to states, which it often does. If EPA grants California's waiver request, 11 other states could follow suit.