http://www.kqed.org/.stream/anon/radio/quest/2011/09/2011-09-05-quest.mp3
After a century of logging, California's old growth redwood forests are only a fraction of what they once were. Today, they remain a narrow coastal band that extends from Monterey Bay to the Oregon border. But redwoods are facing a new threat. As Lauren Sommer reports, scientists are trying to understand how these trees are responding to a changing climate.