Don't be fooled by seemingly "permanent" permafrost.
Engelhaupt
Erika
E
D001110:Arctic Regions; D002170:Canada; D002244:Carbon / Q000032:analysis; D002245:Carbon Dioxide; D017752:Greenhouse Effect; D006801:Humans; D007053:Ice; D008697:Methane; D055110:Radiometric Dating; D013696:Temperature; D018707:Volcanic Eruptions
D007053:Ice; D002245:Carbon Dioxide; D002244:Carbon; D008697:Methane