"GENEVA -- Mercury pollution in the top layer of the world's oceans has doubled in the past century, part of a man-made problem that will require international cooperation to fix, the U.N.'s environment agency said Thursday."

"Utahns have choice words for the ugly, unhealthy clouds that periodically shroud its valleys in winter -- like the one we can expect to endure through Thursday."

"The Environmental Protection Agency has granted California a Clean Air Act waiver allowing the state to set new standards to control emissions of various pollutants, including greenhouse gases, for passenger vehicles through 2025."

"The calls to the city of Houston's 311 help line came in the early morning and the middle of the night - complaints of red smoke, yellow smoke, explosions, fire, a child having trouble breathing."

"The capital's initiative to rid the city of polluting vehicles has taken 458,000 old cars off the road, and the government is providing more benefits to local motorists to encourage them to scrap aging vehicles."

"Early next year, a sophisticated air quality monitor is expected to go into operation near O.D. Wyatt High School in Fort Worth, the 11th such device deployed to measure pollutants in the Barnett Shale."

"The Environmental Protection Agency finalized rules late Thursday to curb pollution from industrial boilers and cement plants, agreeing to give industry additional time for compliance and easing some emissions limits from earlier proposals."

"A federal appeals court today rejected an industry-backed request that it reconsider its decision to uphold Obama administration greenhouse gas regulations."

"FAIRBANKS -- Longtime Fairbanks-area resident Suzanne Fenner doesn't have to check the borough's air quality monitoring website to see whether or not pollution is high. She just looks out the front door. When she sees smoke rolling through, she knows she'll be coughing soon enough."

"Fenner, who's lived in Fairbanks since 1986, was shocked to learn recently she'd developed asthma. After being sick off and on for months, her doctor told her the asthma was a direct result of air pollution. ...

"The U.S. Environmental Protection Agency is expected to release new pollution caps for industrial boilers and cement plants, as it bows to industry pressure to delay their effective date and ease some standards, according to environmental and business groups."