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The melting Arctic ice is fueling a rush for the North Pole region's resources.
Governments are jostling for political control over new passages for ships between the Atlantic and Pacific oceans. The disappearing sea ice could also open the way to exploit a bounty of oil, gas, minerals, and fish once protected by their inaccessibility, scientists and environmentalists caution.
The Arctic sea ice has receded by about 40 percent since 1979. By the end of this century the region could be ice free during the summer months, according to Michael Oppenheimer, a geoscientist at Princeton University in New Jersey.
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