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Denali National Park and PreserveDwarf Fireweed
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Denali National Park and Preserve
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This slump occurred as underlying permafrost melted  

Did You Know?
Warmer temperatures have led to dramatic thawing of permafrost. Thaw releases carbon, as once-frozen materials decompose, but allows increased plant growth. Researchers in Denali are studying whether thawing permafrost will increase or decrease world-wide carbon emissions.

Last Updated: May 28, 2009 at 22:35 EST