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Rocky Mountain National ParkA photo of a volunteer in front of a cabin.
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Rocky Mountain National Park
Revegetation Volunteer
a photo of a revegetation volunteer
Photo courtesy of Rocky Mountain National Park
A volunteer helps with the revegetation effort in the summer of 2003 at Beaver Meadows Visitor Center in Rocky Mountain National Park.
a photo of the mountains at treeline  

Did You Know?
Temperature causes tree line. Trees need an average growing temperature of about 50 degrees fahrenheit.

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Last Updated: April 04, 2007 at 13:06 EST