Yellowstone National Park

The stunning Yellowstone National Park sits on top of a volcanic hot stop and hosts hot springs, pine forests, and geysers, which draw people from all over the world who really want to snag a scenic selfie. But since the mid-20th century, the park has experienced an average temperature increase of more than 2 degrees Fahrenheit. This has meant less snowfall in the park, more wildfires, and unhealthy air quality for visitors and the many animals that call the park home.