The namesake haze that settles over one of America’s most popular national parks might not be as natural as you think. It’s part air pollution.
the EPA looks at specifically are sulfur dioxide, a form of SOx, a form of NOx called nitrogen oxides, ozone gas and particulate matter, all of which are present in the Smokies.
And when the NOx emissions interact with the volatile organic compounds produced naturally by trees and water vapor in the Smokies, the reaction produces ozone gas. The EPA standards not only set limitations to help with visibility but to specifically protect public health and welfare, demonstrating that haze is not just a problem of aesthetics but one involving environmental and public health risks.
Pathak said we’ve learned there are no proven safe levels, that even tighter levels could pose a risk to people. She, too, says exposure to air pollution can be as bad as cigarette smoke and she is not alone in this assessment. , a medical advisor for Mothers and Others for Clean Air and a former epidemiologist for the Center for Disease Control and Prevention.that was published two years ago and they found that ozone causes much emphysema progression.
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