"Pollution from diesel trucks, buses and cars globally is more than 50 percent higher than levels shown in government lab tests, a new study says."

"Residents of a coastal community in Oregon are considering whether to try to derail a fossil fuel export project in their rural county, a decision that could put them at odds with the Trump administration."

"ANN ARBOR, Mich. — Dozens of new cars and trucks go into surgery each day on the quiet green campus here in the heart of auto country. Engineers expose their guts, hook them up to big computers with wires and tubes, and pretend to drive them on massive treadmills in an effort to ensure new vehicles don't emit harmful pollution."

"A federal judge has approved a settlement between Volkswagen and its customers that will see the automaker pay at least $1.22 billion to repair or buy back 3.0-liter diesel vehicles as part of the company’s emissions-cheating scandal."

"Twin Cities is a hot spot in a national study of lakes and road-salt runoff. It showed that salt concentrations in the Mississippi, mostly from road salt, have increased 81 percent since 1985."

"California’s clean-air agency voted on Friday to push ahead with stricter emissions standards for cars and trucks, setting up a potential legal battle with the Trump administration over the state’s plan to reduce planet-warming gases."

"A federal court yesterday rejected an ambitious lawsuit from environmentalists who say federal regulators are biased toward approving natural gas pipelines."

"The cost to implement tough fuel-efficiency standards for cars imposed by the Obama administration for the first half of the next decade could be up to 40 percent lower than previously estimated using existing conventional technologies, according to a report from a nonprofit group released on Wednesday."