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Word: permafrostã (lookup in dictionary) (lookup stats)
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Usage:

...added that he will examine permafrost??€”permanently frozen ground—which has large amounts of greenhouse gases trapped inside. These gases, Anderson explained, have been frozen for millions of years within the ice cap, but are starting to escape due to climate change...

Author: By Gina Yu, CONTRIBUTING WRITER | Title: Professor Studies Arctic Climate Change | 4/23/2010 | See Source »

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