Air

"Carbon dioxide has been vilified for decades as a driver of global warming. A new study finds signs that CO2, exhaled in every breath, can exert an equally worrisome threat -- impaired cognition -- in nearly every energy-efficient classroom, meeting hall or office space."

"The U.S. Environmental Protection Agency asked for a full-court review of a decision by a three- judge panel that threw out a rule designed to cut pollution from coal-fired power plants."

"In the aftermath of Memphis' smoggiest summer in years, local efforts to control air pollution have been thrown into disarray by the city's decision to withdraw funds for vehicle emissions testing and a Shelby County Commission squabble over plans for a new monitoring station."

"Efforts to clean up one of the largest industrial polluters in Illinois will be delayed until the end of the decade after a state panel voted Thursday to give the owner of a massive downstate power plant more time to slash its lung-damaging emissions."

"As one of the hottest summers ever recorded drew to a close, Jay Portnoy watched patients stream into Children’s Mercy Hospital and Clinics in Kansas City, Mo., coughing and wheezing with asthma, 20 admissions per day for the week that started with Labor Day, he said."

"AUSTIN -- Exxon Mobil Corp. has reported inadvertent emissions of large amounts of pollutants at its flagship refinery near Houston."

"MIAMI -- The chief executive of the century-old company from America's heartland shifted nervously on the witness stand here as he tried to explain how a trusted senior vice president had been caught on a wiretap buying half a million dollars in smuggled merchandise, much of it from China."

"Canada's government finalized much-anticipated regulations on Wednesday for phasing out the country's old coal-fired power plants in a move critics condemned as a watering down of earlier proposals to cut carbon emissions."

"The fallout has begun just one day after a federal appeals court scrapped a major EPA rule designed to curb long-distance drifting power plant pollution -- and Louisville's air quality may pay the price."