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Climate change thawing permafrost in Northern Canada
Climate change threatening Canada’s permafrost
Canada's permafrost is melting faster than predicted, study finds
Record temperatures in the North are melting permafrost
Thawing permafrost, climate change's ticking time bomb?
What thawing permafrost has to do with climate change
Thawing permafrost splits trees, causes massive 'slump' in this part of Canada
Is PERMAFROST the Climate Tipping Point of No Return?
What happens when the permafrost thaws?
Top of the World: Mysteries of the Melting Permafrost
Arctic Sinkholes I Full Documentary I NOVA I PBS
Arctic Report Card warns melting permafrost could accelerate climate change
