Air Quality

Atlanta tops a list of the most polluted cities in the country, according to an analysis of EPA data by Forbes.

In order to clean the air in Calcutta, officials have begun enforcing a rule that removes all vehicles manufactured before 1993, mandated by the city's High Court.

The American Lung Association has failed 2/3rds of California's counties in a recent study of levels of smog and soot.

Leaders in Arlington, Texas, near Dallas, are studying how to reduce pollution generated by idling cars at drive-thru windows.

People in 46 American metropolitan areas breathe air that exceeds federal soot levels, according to new figures from the Environmental Protection Agency. Nearly one-third of all Americans live in affected areas.

The Los Angeles and Long Beach Ports’ new Clean Trucks program is the object of a legal battle pitting Teamsters, environmental and public health groups, the NAACP, and community groups demanding clean air against trucking companies and shippers.

With some of the its cleanest air in decades, Beijing is warming up to some of the pollution-cutting regulations officials have enacted during the Olympics. Some may become permanent.

New research from the University of Cincinnati shows that nearly a third of U.S. schools are located within a quarter-mile of major highways, posing a significant air pollution threat to students.

Despite improved air quality, China says it has no plans to continue the car control measures it has enacted during the Olympics to clean the city's air.