"Incoming leaders of the EPA air office will face a consequential choice: Which Trump administration rollbacks will they undo first?"

"Amid growing alarm about methane’s role in driving global warming, a Canadian firm has begun selling a service to detect even relatively small leaks. At least two rivals are on the way."

"A pair of wind-driven wildfires actively burning in Orange County and a couple of nearly extinguished blazes in Los Angeles and San Bernardino counties have spawned the worst air quality in the nation, according to the government’s air quality monitoring agency."

"Scientists at two of America's biggest automakers knew as early as the 1960s that car emissions caused climate change, a monthslong investigation by E&E News has found."

"The deadly virus adds new uncertainties, while a growing body of research shows significant and enduring health risks from wildfire smoke."

"Rich countries are sending millions of older, dirtier vehicles abroad, in a trade that’s largely unregulated, even as they mandate cleaner cars at home."

"Now the companies and countries responsible for a powerful greenhouse gas won’t be able to hide from view."

"Five environmental groups filed a lawsuit against the Department of Homeland Security (DHS) on Tuesday for using tear gas at the protests in Portland, Ore."