The rest of the world may have thought the ozone problem had been solved, but Anderson wasn’t so sure. He persisted in his high-altitude research forays. ER-2 flights from Bangor, Maine, in 1992, ...

Efforts to replace ozone-depleting CFCs have led to successive generations of refrigerants that may be contributing to the ...

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 ...

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 ...

Northern Utah’s ozone pollution problem is not getting better. Two years after the U.S. Environmental Protection Agency moved the northern Wasatch Front from “marginal” to “moderate” status for ...

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 ...

Treating methane as an afterthought in air quality policy is no longer a technical oversight but a political choice, with measurable consequences for citizens’ health, farmers’ livelihoods and ...

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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 ...

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 ...

The Oklahoma Department of Environmental Quality has issued an Ozone Alert for Wednesday, October 5, for the Tulsa metropolitan area. An ozone alert means that conditions are favorable for the buildup ...