New US standards that would effectively ban the most polluting power plants and oil refineries to be announced next year
Vote expected on Thursday on Murkowski's plan to strip the EPA of its right to regulate greenhouse gas emissions
Virginia attorney general says EPA's ruling that carbon emissions threaten human health was based on "questionable scientific reports" and "falsified data "
More bad news for Obama administration's climate change strategy as state governor and coalition of trade groups launch legal action against EPA's right to regulate emissions
Chamber files suit against EPA ruling that it can legislate against carbon emissions under the Clean Air Act
Sulphur and nitrogen targeted by Clean Air Amendments
Four new chemical groups named as Chemicals of Concern, as EPA also announces new rules to ensure polluters pay to clean up their mess
Landmark ruling strengthens president's ability to deliver climate change deals in both Washington and Copenhagen
Large permitting producers to account for their greenhouse gas emissions
New EPA rules will require around 10,000 heavy polluters to report on their 2010 greenhouse gas emissions