Breaking it down by impact category: 98% of the parks they studied suffered from haze pollution, 96% faced ozone pollution that impacts humans and 96% of national parks have plants and animals ...

National parks have had similar ozone values to that of the 20 largest major cities in the US states from 1990-2014, according to a study published Wednesday in Science Advances.

Air pollution in U.S. national parks such as Yellowstone, Yosemite and Acadia is as bad as some of the nation's largest metropolitan areas, according to a new study.

This air pollution wafts into national parks from our potent industrial areas. There's no way to keep it out. "We’re producing something that's being brought to the pristine areas ...

Step out on a beach shore, up on a mountain peak, or into a sequoia grove, and many instinctively take the quintessential deep breath of fresh air. You know the one. The one where you breathe in ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays. Watch Now.

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...

The report looked at three main ways in which air pollution impacts parks: hazy skies, unhealthy air and harm to nature. 1 weather alerts 1 closings/delays Watch Now ...