Four years after oil company's criminal conviction for air pollution, still no sentencing

The Obama administration is turning the tables on Republican foes of climate regulation, demonstrating not only that cap-and-trade works — i

Court boosts environmental advocates seeking stronger enforcement

Industry that resists new climate change rules sometimes lacks long-required pollution controls, too

Smokestacks as tall as the Eiffel Tower are merely moving pollution downwind

Industry, Republicans aim to stall what agency considers life-saving limits on mercury and other emissions

EPA aims to drop anti-pollution gear on gasoline pumps in 2013

EPA's advisory board recommended tightening regulations on pollution from diesel vehicles and power plants, but EPA decided against it

The stricter ozone standard spiked by White House might have had less than anticipated impact on business - and politics

Secret government 'watch list' reveals failure to curb dangerous emissions