In parts of Northern California, background ozone levels already account for more than three-quarters of total ozone, leaving little room for local ozone production if stricter standards go into ...

For a large part of the last two weeks, Steven Brown, an air quality chemist with the National Oceanic and Atmospheric Administration, has soared over Colorado’s Front Range in a slow-flying Twin ...

This article was originally featured on KHN. A year after health officials issued a record number of alerts for high ozone levels on Colorado’s Front Range, federal and state officials are trying to ...

Getting your Trinity Audio player ready... Colorado continues to fail to clean the dirty air that hangs over the northern Front Range, so state regulators plan to ask the Environmental Protection ...

NASA and NOAA recently announced good news concerning the ozone hole. What are lessons about science, policy and skepticism for other challenges?

A year after health officials issued a record number of alerts for high ozone levels on Colorado’s Front Range, federal and state officials are trying to rein in the gas that can make outdoor ...

The cold winter months may bring temporary relief from Colorado’s long-running ozone pollution problem, but it’s crunch time for air quality planners and regulators hoping to finally clear the air ...

Some health experts say current state and federal measures won’t lower ozone pollution to safe levels across the state’s Front Range. A year after health officials issued a record number of alerts for ...

A year after health officials issued a record number of alerts for high ozone levels on Colorado’s Front Range, federal and state officials are trying to rein in the gas that can make outdoor ...

While ozone pollution is typically a summer phenomenon in Maricopa County, ozone season stretched well into the fall this year. High ozone levels usually drop off in mid-September, but Maricopa County ...

Getting your Trinity Audio player ready... By Jim Robbins, Kaiser Health News A year after health officials issued a record number of alerts for high ozone levels on Colorado’s Front Range, federal ...