"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."

"Wildfires above the Arctic Circle in June have unleashed carbon emissions that are the third highest for the time of year in two decades of monitoring, European scientists said on Thursday."

"For the second time this year, a chemical recycling plant built to turn waste into usable products has closed, casting further doubt on the viability of an upstart industry that has been plagued by financial and technical challenges in its effort to scale up."

"The Supreme Court has dealt another blow to a major EPA air pollution control initiative, freezing implementation of the agency’s latest crackdown on smog-forming emissions that cross state lines."

"In heat waves, chemicals like formaldehyde and ozone can form more readily in the air, according to researchers driving mobile labs in New York City this week."

"Warmer temperatures may be catalyzing a climb in vaporized chemical contaminants across Los Angeles, a new study has found."

"The chemical plume from the February 2023 train derailment in East Palestine, Ohio, spread air pollutants to at least 16 states, according to research published Wednesday in the journal Environmental Research Letters."