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 ...

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.

The ban on ozone-depleting substances that successfully reversed the growth of the hole in the ozone layer isn’t seen as a missed opportunity. On the contrary, the quick global response is one of the ...

The ozone layer is a part of Earth’s atmosphere that captures some of the Sun’s ultraviolet (UV) light emissions. When the ozone layer is compromised, its ability to absorb radiation weakens, allowing ...

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 ...