State regulators have resisted replacing their inspection programs with on-road testing, yetthere is no other means to more substantial, rapid, or inexpensive improvements in air quality.

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.

Acloser look at the data reveals that high ozone levels are found to be occurring on weekends, when emissions of nitrogen oxides are often 40 percent lower than weekdays.

Air pollution has been a part of human existence for thousands of years, and accounts of noxious urban air go back to ancient times.

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

Dispelling the myths and illuminating the facts concerning the ground-level ozone issue.

TheEnvironmental Protection Agency's proposalto tighten ozone regulation poses a significant risk of public harm with little reason to expect much in the way of benefits.

Contrary to popular belief, ethanol fuel will do little or nothing to increase our energy security or stabilize fuel prices.