North America's last great frontier could be Greenland

摘要

Perhaps the last great frontier of the North American continent is Greenland, the world's largest island. The self-governing Danish province has leased concessions off its western coast, which is ice-free for about five months a year. Operators with acreage in western Greenland include ExxonMobil, Chevron, EnCana, Husky and Cairn Energy.