"A group of scientists assembled by the EPA to advise it on air pollution standards couldn’t reach agreement on whether the standards should be tightened or remain the same, a development that may complicate ongoing effort to update them."

"New data may signal a deadly change in America’s environmental health."

"After years of decline, a spike in air pollution may have taken the lives of almost 10,000 additional Americans over two years.

Following a 24% drop between 2009 and 2016, particulate matter air pollution in the U.S. increased 5.5% in 2017 and 2018, according to a new analysis of Environmental Protection Agency data by two Carnegie Mellon economists.

The working paper published this week by the National Bureau of Economic Research may signal a deadly change in U.S. environmental health.

"Thanks to unusually warm temperatures high above Antarctica this month, the ozone hole shrank to its smallest size on record, scientists reported Monday."

"When leaders from Exxon Mobil and BP gathered last month with other fossil-fuel executives to declare they were serious about climate change, they cited progress in curbing an energy-wasting practice called flaring — the intentional burning of natural gas as companies drill faster than pipelines can move the energy away. But in recent years, some of these same companies have significantly increased their flaring ... ."

"Transportation is the largest source of planet-warming greenhouse gases in the United States today and the bulk of those emissions come from driving in our cities and suburbs."

"After two days of deliberations, an unofficial panel of air quality experts has tentatively concluded that EPA's fine particulate matter standards need significant tightening. Though agency leaders may not pay heed to their findings, the panel members are optimistic that federal judges will listen."

"California's top air regulator accused EPA Administrator Andrew Wheeler of twisting facts for political purposes in a letter sent yesterday."

"What was billed as an extraordinary event launched this morning [Thursday] in the most mundane of surroundings: a neutral-toned conference room that featured scientific researchers seated around a makeshift table."