"The Environmental Protection Agency on Aug. 1 proposed changes to the Clean Air Act’s New Source Review permitting program, which currently requires industrial facilities to install new pollution controls each time a company adds a new facility or expands existing operations."

"More than half a million Russians have demanded the authorities do more to tackle vast wildfires in Siberia that environmentalists have dubbed an ecological catastrophe, but which officials have said would be “pointless” to put out."

"The expert panel advising EPA on particulate pollution doesn't include a representative from the discipline responsible for most of the scientific evidence that soot is a public health hazard."

"Welcome to the coldest capital city on earth — Ulaanbaatar, Mongolia — where the temperature can drop to minus 20 degrees Fahrenheit at night. The city's population has nearly tripled since 1989. Without infrastructure to service all 1.4 million people, residents off the electric grid are burning raw coal to stay warm. The result? Winters with extreme air pollution."

"The Trump administration failed to consult dozens of state officials about the rollback of Obama-era clean car rules, according to a new letter from 12 Democratic attorneys general."

"Major U.S. cities may be leaking far more methane into the atmosphere than government estimates suggest."

"The Environmental Protection Agency’s inspector general will investigate allegations that William L. Wehrum, the agency’s former air quality chief, violated ethics rules when he met with former clients from his days as a lawyer and lobbyist for the oil, gas and coal industries."

"The Environmental Protection Agency (EPA) pointed to a new study released Wednesday to emphasize what it characterized as the Trump administration’s achievements in decreasing air pollution."

"The number of unhealthy air days in major cities across the United States has risen sharply over the last two years, even as emissions of key pollutants continue to slip, according to data released by the Environmental Protection Agency on Wednesday."