"Air district officials filed a lawsuit Thursday seeking up to $40 million from a Vernon battery recycler accused of posing a health risk for emitting too much lead and arsenic."

"The Environmental Protection Agency will finally publish notice of new proposed rules limiting greenhouse gas emissions from new power plants on Wednesday, more than three months after announcing the rules last September."

"The U.S. government is planning stricter controls on exposure to silica, a carcinogen found in workplaces ranging from dentist's offices to granite quarries, according to a new report."

"LOUISVILLE, Ky. -- A group of Louisville residents who say coal ash from a nearby power plant drifts into their lungs and homes have sued the utility company."

"Chinese authorities have told pilots who fly to Beijing they must be qualified to land their aircraft in the low visibility bought about by smog -- the latest missive related to the capital's heavy air pollution, which the government this week lauded as a beneficial shield against missile attacks."

"The hole in the ozone layer is stabilizing but will take until about 2070 to fully recover, according to new research by NASA scientists."

"Commentaries by two of China's most influential news outlets suggesting that the country's air pollution crisis was not without a silver lining drew a withering reaction on Tuesday from internet users and other media."

"Hundreds of thousands of children still at risk from dangerous levels of air pollution as poisonous smog fills cities, study says"

"The U.S. environmental regulator argued in court on Tuesday that its rule limiting mercury and hazardous air pollutants is 'appropriate and necessary,' not an improper interpretation of the federal Clean Air Act as industry groups and some states contend."

"WASHINGTON -- U.S. Supreme Court justices offered President Barack Obama's administration some encouragement on Tuesday as they weighed the lawfulness of a federal regulation limiting air pollution that crosses state lines, mostly emissions from coal-fired power plants."