 CBS News |
Sequoia National Park: Worst air pollution
San Francisco Chronicle Sequoia National Park — On a clear day, the view from Beetle Rock in Sequoia National Park extends west for 105 miles across the patchwork of crops in California's agricultural heartland to the Coast Mountains and the Pacific Ocean beyond. Sequoia National Park: California Smog Threatens World's Oldest Trees smog threatens trees at Sequoia National Park Sequoia smog damaging pines, redwood seedlings |