What is "permafrost" and why is it melting?: Global Warming: Melting Glaciers

What is "permafrost" and why is it melting?: Global Warming: Melting Glaciers

What is "permafrost" and why is it melting?: Global Warming: Melting Glaciers

What is "permafrost" and why is it melting?: Michael Oppenheimer (Professor, Princeton University)

User: Scribble

Views: 2

Uploaded: 2015-04-15

Duration: 01:19

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