"The Environmental Protection Agency is set to release a contentious new rule limiting surface-level ozone pollution.

The agency has proposed tightening the current standard on ozone from 75 parts per billion to 65 or 70 parts per billion.

Regulators say they need to raise the standards to help the environment and improve public health. But the proposal has drawn scorn and bitter opposition from Republicans and business groups, who say the rule will be prohibitively expensive and lead to billions of dollars in compliance costs."

Devin Henry reports for The Hill September 28, 2015. [2]