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Title: In the polar biomes, increasing depths of the permafrost and increasing infestations of bark beetles ... Post by: dwcarlton98 on Nov 8, 2016 A.construction of the Alaska pipeline
B.increased logging of the region C.global climate warming D.forest fires Title: Re: In the polar biomes, increasing depths of the permafrost and increasing infestations of bark ... Post by: Tesa on Nov 9, 2016 global climate warming
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