"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."

"The U.S. State Department has signed and issued a presidential permit to construct the Keystone XL pipeline. That reverses former President Barack Obama's 2015 decision to reject the controversial pipeline."

"President Donald Trump is proposing to cut or eliminate several key federal infrastructure programs despite repeated vows to increase spending on roads, utilities and other vital facilities."

"President Trump came to the heart of the auto industry on Wednesday with a manifesto for American manufacturing: to remove the shackles of regulation and restore an age of industrial glory."

"President Trump will travel to Detroit on Wednesday to announce a rollback of stringent fuel economy standards for cars and trucks that were put in place by the Obama administration — a welcome message to American automakers but one that could slow the push for a new generation of efficient vehicles."