The circuit court ruled that Congress gave the EPA insufficient statutory guidance in the Clean Air Act to form the basis for those standards.

What we need to know is how bad the EPA claims the air is, and whether that claim is credible.

Oregon's new budget bill would prevent Gov. Ted Kulongoski from implementing California's automobile emissions limits in Oregon. The governor should reconsider his threat to veto.

Air pollution affects far fewer people, far less often, and with far less severity than suggested by media and activist reports.

As studies show that ethanol from corn may not be the answer, funds should be redirected toward other efforts in energy security and climate change.

Despite continued declines in emissions, environmentalists and their allies desperately want us to believe air pollution will skyrocket unless we impose far more aggressive regulations.

Is the Union of Concerned Scientists misleading the public when it comes to air pollution and air quality?

What caused thelarge rise in asthma?One hypothesis is that people no longer get as many infectionsin childhood,making them more susceptible to allergic diseases such as asthma.