"PITTSBURGH -- A project examining the local health impacts from natural gas drilling is providing some of the first preliminary numbers about people who may be affected, and the results challenge the industry position that no one suffers but also suggest the problems may not be as widespread as some critics claim."

"DENVER -- Colorado regulators looking at new air quality rules for oil and gas drillers are getting more time to set the rules."

"WASHINGTON — As part of the climate change agenda he unveiled this year, President Obama made a commitment to significantly reduce the federal government’s dependence on fossil fuels. The government, he said in a speech in June at Georgetown University, 'must lead by example.' But just two miles from the White House stands the Capitol Power Plant, the largest single source of carbon emissions in the nation’s capital and a concrete example of the government’s inability to green its own turf."

"Federal judges today upheld U.S. EPA's ozone air standard in a challenge from public health groups that said the agency ignored a scientific consensus pointing to a stricter limit."

"With a massive freight yard expansion backed by Mayor Rahm Emanuel poised to bulldoze the northeast corner of Englewood, a new analysis suggests the project would substantially increase lung-damaging pollution in a neighborhood already plagued by high rates of asthma."

"Listen to Harvey Gebhard talk about grilling and you can almost smell the smoke. Gebhard is the CEO of the Lone Star Barbecue Society, a group that organizes charity cook-offs."

"In a win for the U.S. Environmental Protection Agency, the Supreme Court on Monday agreed to consider the legality of a controversial Obama administration effort to regulate air pollution that crosses state lines."

"TAYLORVILLE, Ill. -- A Nebraska company dropped plans to build a $3.5 billion coal-based power plant in central Illinois, saying it instead will focus on developing natural gas-fueled and renewable facilities elsewhere."

"Kish, the visible form of mill's pollution, 'invaded' homes, leaving residents to worry about health effects."

"Haze from fires in Indonesia blanketing Singapore could persist for weeks or longer, Prime Minister Lee Hsien Loong said on Thursday, as the smoke drove air quality to "hazardous" levels and disrupted business and travel in the region."

"BALTIMORE, Md. -- Gov. Martin O'Malley has interceded with the U.S. Environmental Protection Agency on behalf of Carnival Cruise Lines after the company threatened to pull its business from Baltimore over a pending air-quality regulation that would require large, ocean-going ships to burn cleaner fuel."

"HONG KONG -- China’s cabinet has adopted 10 measures to improve air quality in the latest move aimed at responding to the dense smog that has repeatedly enveloped Beijing and other major Chinese cities in recent years."

"GE Energy Services' coal-fired power plant in Homer City will be required to meet federal standards for emissions of sulfur dioxide that are more protective of human health."

"The Houston area produces about a quarter of the nation's gasoline, and about a third of the plastics that are in our cars, cupboards and just about everywhere else. So it is no surprise that this heavily industrial area has a problem with air pollution. But in the past decade, Houston's air has improved dramatically."

"Federal judges [Tuesday] rejected challenges from both industry and environmental groups to U.S. EPA's air standards for lead smelters."