Polls routinely find that most Americans believe air pollution has been getting worse, will worsen in the future, and is still a serious threat to health. The reality is just the opposite: air pollution has been dropping for decades, will continue to do so, and has become a minor factor...

Air Quality in America rebuts mistaken perceptions that U.S. air quality is bad by documenting marked improvements over the past decades.

What can we make of a new study on the effects of climate change on future air pollution?

Most Americans still believe air pollution is a growing problem and a serious threat to their health. In reality, air quality in America's cities is better than ever.

Quick: How many kinds of gasoline do we use in America? Most people would say three or six: regular unleaded, mid-grade, and premium, along with the ethanol blends of the same that have become nearly universal. The actual number is somewhere above 45, though hard to pin down exactly, according...

Environmentalists, regulators, health scientists, and journalists create the appearance that harm from air pollution is much greater and more certain than suggested by the underlying evidence.

Evidence continues to mount that air pollution at contemporary low levels is causing little or no harm, even in the most polluted areas of the country.