Sublette measures levels that clean-air advocates say should trigger controls, but state regulators demur saying rules are unclear.
Clean Air Act
Unit 3 burned 165 tons of coal an hour, but it won’t consume as much as a briquette tomorrow.
Pruitt’s behavior is scandalous even by Trump standards, but he’s safe so long as Wyoming’s Jr. senator chairs the committee overseeing him.
The National Park Service wants U.S. EPA to set a more protective standard for ground-level ozone pollution to minimize impacts to plants and ecosystems.
In Wind River Range, where air is supposed to be pristine, pollution changes life in alpine lakes