"Miners huddled around them to stay warm through the long, cold nights in the Klondike gold rush of the 1800s. Artists have enshrined them in paintings and tourist curios. For many people in America’s far north, the old-fashioned wood stove — crackling and radiant, and usually cast-iron black — is as Alaskan as it gets. But many Alaskans also see their home state as a natural wonderland, where the expectation of bracingly pristine air is just as deeply ingrained."

"The EPA aims for US car fleets to average 54.5 miles per gallon in 2025 – and seeks to keep Republicans from changing the policy in 2017."

"Colorado officials say it will be 2021 before the state meets the current federal health standard for ozone air pollution — for which metro Denver and the northern Front Range have been out of compliance for more than four years."

"More than 200 people have been hospitalized with breathing difficulties in Tennessee as wildfires scorched the Southeast. Over 30 large fires have burned more than 80,000 acres in North Carolina, South Carolina, Georgia, Tennessee, Alabama and Kentucky, according to the US Forest Service."

"NEW DELHI — For the first time ever, more than 1,800 public primary schools in India’s capital will close on Saturday to protect children from exposure to dangerous levels of air pollution, the authorities said on Friday."

"About 300 million children in the world breathe highly toxic air, the United Nations Children’s Fund said in a report on Monday that used satellite imagery to illustrate the magnitude of the problem."