Democrats in Congress sought to stake out a compromise on climate control legislation on Thursday as environmentalists awaited California's decision on new limits on auto emissions.
President Barack Obama's top climate negotiator warned on Wednesday that international efforts to tackle global warming are doomed unless the United States enacts laws to limit greenhouse gas emissions.
The U.S. Congress on Tuesday began work on a bill that would fundamentally change the way American factories and power plants use and supply energy as part of the Obama administration's drive to cut harmful greenhouse gas emissions.
The Obama administration's declaration that greenhouse gas emissions endanger human health comes as Congress prepares legislation to significantly reduce those emissions and spur the use of cleaner alternative fuels.
Friday's announcement by the Environmental Protection Agency was widely expected among lawmakers. Nonetheless, it could influence the debate that is unfolding in a few ways:
