EPA: On second thought, carbon emissions are a threat to the public

The EPA’s action marks a major shift in the federal government’s approach to global warming. The Bush administration opposed putting mandatory limits on carbon dioxide and other greenhouse gases, on the grounds that they would hurt business, and the EPA had resisted identifying such emissions as pollutants under the Clean Air Act.

What happens next is unclear. The agency’s proposed finding is likely to intensify pressure on Congress to pass legislation that would limit greenhouse gases, as President Obama, many lawmakers and some industry leaders prefer. But cap-and-trade legislation, which would limit emissions and allow emitters to trade pollution allowances, is fiercely opposed by a coalition of Republicans and Democrats from fossil-fuel-dependent Midwestern states who fear that such a system would raise energy prices and hurt the nation’s economy.