An EPA advisory panel will probe agency staffers’ handling of the science behind their preliminary conclusion that the ozone limit doesn’t need tightening and could heighten pressure to change the ...

EPA is restarting review of a high-stakes decision on ground-level ozone standards in a step that short-circuits the prospects for any imminent action to tighten limits on the lung-damaging pollutant.

To a climate skeptic who thinks the story from the '90s about the big hole in the ozone layer that was "going to kill us" might itself have some holes in it and wants to know what happened to the ...

The US Environmental Protection Agency is launching a new review of the Ozone National Ambient Air Quality Standards, delaying the possibility of tighter regulations on the smog-forming pollutant. EPA ...