"Almost 150 million people live in areas where air pollution levels are unhealthy to breathe, an increase from a previous American Lung Association report."

"In a major victory for the Obama administration, the Supreme Court on Tuesday upheld the authority of the Environmental Protection Agency to regulate the smog from coal plants that drifts across state lines from 28 Midwestern and Appalachian states to the East Coast."

"Automakers on average have reduced the greenhouse gas footprint of their model year 2012 passenger vehicles even below the levels required by U.S. EPA's new tailpipe emissions rules, according to a new report released today by the agency."

"Nestled into a seaside forest on the University of British Columbia's lands, amid a carpet of sword ferns and salal, sits a gleaming industrial facility that's been hailed as a significant step toward a carbon-neutral future for B.C., Canada and even the world."

"A few casual words and the early release of some scientific data have cost the San Antonio region much-needed state funds to battle its growing air pollution problem. The misstep, which appears to have been unintentional, highlights the sensitivity of studying oil and gas pollution in business-friendly Texas."

"Cutting nitrogen dioxide levels for people of color could prevent thousands of deaths, Minnesota researchers said."

"WASHINGTON — A federal appeals court Tuesday upheld the Environmental Protection Agency's first-ever limits on air toxics, including emissions of mercury, arsenic and acid gases, preserving a far-reaching rule the White House had touted as central to President Barack Obama's environmental agenda."

"WHEELING - Breathing only a tiny amount of silica dust per day - enough, roughly, to cover Franklin Delano Roosevelt's nose on a dime - can put a worker at risk for myriad health problems, according to Michael Breitenstein of the National Institute for Occupational Safety and Health."

"Study finds air emissions from biomass facilities could be dramatically improved if so-called loopholes are closed in power plant regulations."