"Air pollution should be one of the avoidable heart risk factors - just like smoking and excess fat - that doctors warn patients to steer clear of, according to a new statement from 20 heart experts."

"Women who are exposed to high levels of air pollution during their third trimester of pregnancy may be twice as likely to have an autistic child, a study found."

"Thick tar clogging 350 sq km of delicate mangrove forest and river delta, home to endangered Bengal tigers and rare dolphins."

"AUSTIN — In 2007, Texas regulators quietly relaxed the state’s long-term air pollution guideline for benzene, one of the world’s most toxic and thoroughly studied chemicals. The number they came up with, still in effect, was 40 percent weaker, or less health-protective, than the old one."

"The Obama administration as soon as Wednesday will announce its plans for curbing methane emissions from the oil and gas sector, which the United States must do to meet its 2020 target for cutting greenhouse gas emissions, people familiar with the issue said Tuesday."

"The federal government is about to announce its first rules for the handling and storage of potentially toxic coal ash, months after tons of the waste spilled into a major river in North Carolina."

"Federal prosecutors charged Freedom Industries and six of its owners, managers and employees with criminal violations of the Clean Water Act related to the January 2014 chemical leak that contaminated the drinking water of 300,000 people in Charleston and surrounding communities."

"More than 16,000 miles of Virginia rivers are polluted, a new report shows. That’s up nearly 3,000 miles from the previous report two years ago."

"While the Obama administration is touting Virginia's pollution trading program as an 'innovative market-based approach' to cleaning up the Chesapeake Bay, Maryland's trading effort remains stuck in limbo after years of study and debate."