Most national parks impacted by air pollution, new report says
The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature.
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The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature.
A report finds that one in four people in the U.S. breathe unhealthy air as rising temperatures and bigger fires create a "climate penalty."
Smog is so bad in the Indian capital that years are being taken off people's lives, but China has shown how...
The head of the Colorado Energy office explains why he believes the state's new greenhouse gas reduction plan is an effective way to clean the air and protect businesses
On UN holiday International Day of Clean Air for blue skies, KGUN 9 takes a look at how Tucson ranks among Western metropolitan cities.