National Public Radio: Intense forest fires have been raging across the western United States this summer. So far this year, nearly 43,000 wildfires have torched almost 7 million acres of land. As NPR Science correspondent Christopher Joyce and photographer David Gilkey report from Arizona and New Mexico this week, the forests of the American Southwest have become so overgrown that they're essentially tinderboxes just waiting for a spark. This "tree epidemic" stems from Forest Service policy dating back to the early...
URL: http://www.npr.org/blogs/pictureshow/2012/08/23/159614784/our-changing-forests-an-88-year-time-lapse?ft=1&f=1025
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