"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."

"Due to heavy fertilizer use, California's Central Valley is behind up to 41 percent of the state's emissions of nitrogen oxide — an air pollutant and climate-warming gas".

"A large proportion of California's nitrogen oxide—which can cause harmful ozone and a variety of health impacts—comes from heavy fertilizer use in the state's Central Valley, according to a new study.

"A federal court granted the Environmental Protection Agency (EPA) a victory Thursday, allowing regulators to give U.S. livestock producers more time to comply with a mandate on reporting emissions from animal waste."

"Ten U.S. states and the District of Columbia said Thursday they are challenging a decision by the Trump administration to drop a requirement that Harley-Davidson Inc (HOG.N) spend $3 million to reduce air pollution under settlement the Obama administration announced."