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Web. . The reindeer's grazing controls this growth and thus makes a crucial contribution to keeping global heating at bay.
. 22 these changing concentrations have acted as a positive climate feedback, amplifying the. Transportation and Infrastructure Impacts.
. during cool glacial periods, carbon dioxide levels were lower.
. . As this happens, permafrost warms. . . Web. Major environmental issues caused by contemporary climate change in the Arctic region range from the well-known, such as the loss of sea ice or melting of the Greenland ice sheet, to more obscure, but deeply significant issues, such as permafrost thaw, social consequences for locals and the geopolitical ramifications of these changes. In August 2012, a giant summer cyclone churned up the Arctic sea ice, breaking it into pieces. Disruptive climate change ice flows will give the Royal Navy a narrower window of activity than its peers in the Arctic. yahoo.