Air

"Reducing nitrous oxide emissions from U.S. chemical plants could reduce greenhouse gas emissions at little cost. Similar plants in China offer a “far bigger prize.”"

"The sun looked orange as it shined through a thick blanket of wildfire smoke on Tuesday across a large area of North America, including in Denver, and the smoke could spread even farther in the coming days."

"The sun appeared orange and red through a layer of haze on Tuesday morning as a large blanket of wildfire smoke covered part of the central United States and Canada.

"Research showed truck-related releases of nitrogen dioxide, which can cause asthma, concentrated around some 150,000 warehouses nationwide."

"Chasing tornadoes is far from glamorous, and the thrill of spotting them is far from guaranteed. Success usually requires expertise and long hours in pursuit."

"Though the regs are expected to halve air releases of toxic metals, the tribe has voiced concern about increased pollution to meet demand for electric vehicles."

"The federal government announced a $241.5 million settlement with Marathon Oil on Thursday for alleged air quality violations at the company’s oil and gas operations on the Fort Berthold Indian Reservation in North Dakota."

"General Motors will pay nearly $146 million in penalties to the federal government because 5.9 million of its older vehicles do not comply with emissions and fuel economy standards."

"A single line included in the proposed annual appropriations bill for the U.S. Department of Labor and other agencies could — if adopted by congress later this year — halt the implementation of a newly finalized rule limiting the amount of silica dust miners are exposed to while working underground."

"A federal appeals court in Washington, D.C., has refused to block a new federal rule requiring Denka Performance Elastomers to dramatically limit the release of chloroprene, a likely cancer-causing chemical, within 90 days or shut down its LaPlace plant."