"The Clean Air Council has filed notice it will sue the U.S. Environmental Protection Agency unless the agency forces the Allegheny County Health Department to review and issue long overdue operating permits for many of the county’s biggest industrial air pollution sources."

"In the debate over how quickly to make American cars pollute less, the nation’s auto-parts makers are now in open disagreement with the automakers that buy the countless transmissions, turbochargers and other components that make up modern automobiles."

"A bipartisan group of senators introduced a bill Friday that would let the Environmental Protection Agency (EPA) implement a global deal meant to phase out certain greenhouse gases."

"A federal court today [Friday] sided with environmentalists in vacating a significant chunk of an Obama-era rule guiding implementation for the 2008 ozone standard."

"The deodorants, perfumes and soaps that keep us smelling good are fouling the air with a harmful type of pollution — at levels as high as emissions from today’s cars and trucks."

"The gravel parking lot at the Fitzgerald family’s truck dealership here in central Tennessee was packed last week with shiny new Peterbilt and Freightliner trucks, as well as a steady stream of buyers from across the country. But there is something unusual about the big rigs sold by the Fitzgeralds: They are equipped with rebuilt diesel engines that do not need to comply with rules on modern emissions controls."

"California officials and clean air advocates are increasingly concerned the Trump administration may attempt to unravel a key program to drive down greenhouse gas emissions from automobile fleets while also jeopardizing the ability of California and other states to set pollution standards stronger than federal rules."

"The rescue of the planet’s protective ozone layer has been hailed as one of the great success stories of modern environmental regulation — but on Monday, an international team of 22 scientists raised doubts about whether ozone is recovering as expected across much of the world."