Have you got a telephone directory? vimax canada "This rapid thawing is unprecedented" and is largely due to fossil-fuel emissions, says Kevin Schaefer of the National Snow and Ice Data Center in Boulder, Colo. He says it's already emitting its own heat-trapping carbon dioxide and methane, but the amount will skyrocket in the next 20 to 30 years. "Once the emissions start, they can't be turned off."