EPA

Court ruling that promises to tighten air quality rules for around 1,000 power plants is hailed as a "resounding victory for public health"

Study raises fears that US shale gas sites could be responsible for higher levels of methane emissions than previously thought

Supreme Court hears latest in a long line of arguments attempting to neuter the Obama administration's new emissions regulations

Flurry of green policy announcements welcomed by campaigners, but concerns remain recent progress could be undermined by pipeline approval

Who else is making progress on renewable energy? Wal-Mart, Whole Foods, the city of Houston and more

New package of proposals seeks to water down regulations governing coal ash and other forms of harmful waste

Obama's commitment to climate action to push environmental policy to the top of the political agenda

New regulations based on US Clean Air Act welcomed by green groups but strongly criticised by coal industry

EPA asserted authority to move forward without new laws from Congress at hearing where contrarian views were on display

Gina McCarthy uses first set-piece speech to argue that controversial emissions regulations will 'spark business innovation'