Sequoia National Park

According to a recent report from the National Parks Conservation Service, that last part of the equation is problematic at several national parks, including Sequoia, Kings Canyon and Yosemite National Parks. Startlingly, the report names Sequoia and Kings Canyon as among the parks with the worst air pollution in the country, meaning that the parks “had unhealthy air for most park visitors and rangers to breathe for more than two months of the year, mostly in the summer months.”