How Pollution Is Ruining America’s National Parks

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U.S. national parks are a place to escape pollution, but that may not be true anymore. So, what’s making the air at the parks so unhealthy?

Learn More:
Polluted Parks How Dirty Air is Harming America’s National Parks
“As the National Park Service approaches its 100th anniversary, time is running out for President Obama to fulfill our country’s promise to clean the air in our national parks.”

These National Parks Got an “F” in Air Pollution
“It’s late summer, and Americans are flocking to the country’s national parks for some recreation and fresh air.”

An ‘F’ in air quality: California national parks top the list for worst pollution
“Laura Doughty didn’t expect the smog she associates with Las Vegas summers to follow her on vacation.”

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