clean air act

Wyoming’s plan for managing pollution from some of its coal plants is okay for now, due to a recent court ruling. While the state sees this as a win, environmental groups are concerned.

The Mountain West is known for big blue skies. But several cities here are among the nation’s worst for short-term air pollution levels, according to a new American Lung Association study. Wildfire smoke is an increasing factor, but so is smog from growing cities across the region.

A ruling could settle the decades-long dispute over the scope of the landmark law, with big implications for wetlands and ephemeral streams around the West.

A federal judge has ruled the Environmental Protection Agency has two weeks to figure out how to quantify coal jobs lost because of regulation.The EPA…

Saying that it wants more Tribal Sovereignty, the Northern Arapaho tribe is leaving the Joint Tribal Business Council it had shared with the Eastern…

Some landowners with oil and gas wells on their property complain about emissions affecting their air quality and health. But though there may be a lot of…

The comment period closed Monday on the Environmental Protection Agency’s proposed Regional Haze Plan. The plan seeks to address the issue of air…

Once again, Sinclair Oil has agreed to pay a penalty for violating the Clean Air Act at its refinery near Rawlins. The latest fine is for $378,000.The…

The energy company Kinder Morgan is paying a $316,000 penalty for violating Clean Air Act regulations at natural gas plants in Casper and Douglas.The…

Sinclair Oil has agreed to pay a fine of $3.8 million and install pollution controls at its refineries in Casper and Rawlins, to settle a lawsuit that the…