In this May 11, 2012 photo, the view from Beetle Rock in Sequoia National Park, Calif., is seen. A big city problem has settled in a big way in Sequoia Kings Canyon National Park, home of the giant ... more 
In this May 11, 2012 photo, the view from Beetle Rock in Sequoia National Park, Calif., is seen. A big city problem has settled in a big way in Sequoia Kings Canyon National Park, home of the giant Sequoias. Smog from the neighboring Central Valley is making it tougher for seedlings from the giants to take hold, and the needles of surrounding Jeffrey and Ponderosa pines are yellowing. (AP Photo/Tracie Cone) less 
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Associated Press | Photo By Tracie Cone
Mon, May 28, 2012 11:54 AM EDT