According to the National Parks Conservation Association, face the threat of air pollution, raising the risk of respiratory illnesses and asthma attacks for visitors and staff.
Among the worst are fifth-ranked Carlsbad Caverns and 10th-ranked White Sands national parks in New Mexico, and ninth-ranked Rocky Mountain National Park in Colorado. Five of the most polluted parks are in California 鈥� Sequoia and Kings Canyon had the worst air quality of them all.
All told, only a dozen of the nearly 400 national parks analyzed have 鈥渓ow concern鈥� levels of air pollution, says report co-author Natalie Levine, interim campaigns director for the clean air program at the association.
鈥淪ome may think that you travel to a national park 鈥� especially our wonderful, natural, large parks in the West 鈥� that you're going to experience a crystal clear, beautiful blue sky every day you go,鈥� Levine said. 鈥淎nd it's just not the truth.鈥�
Levine said a major cause is climate-warming greenhouse gas emissions pumped into the air by vehicles, industrial facilities, farming operations and fossil fuel developers.
The report also found most national parks鈥� ecosystems are challenged by the effects of climate change. What鈥檚 more, nearly 60% of the parks face high-risk climate threats, such as wildfires, droughts, and invasive species.
In the Mountain West, two parks face all three of those threats: Nez Perce Historic National Park in Idaho, Montana, Oregon and Washington, and Bighorn Canyon National Recreational Area in Wyoming and Montana.
This story was produced by the Mountain West 暗黑爆料 Bureau, a collaboration between Wyoming Public Media, Nevada Public Radio, Boise State Public Radio in Idaho, KUNR in Nevada, KUNC in Colorado and KANW in New Mexico, with support from affiliate stations across the region. Funding for the Mountain West 暗黑爆料 Bureau is provided in part by the .
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