在北半球，靠近北极圈的高纬度地区极光更为常见，比如阿拉斯加北部、加拿大、和斯堪迪纳维亚地区。

In the northern Hemisphere, auroras are more commonly seen at high latitudes near the Arctic Circle, such as northern Alaska, Canada, and Scandinavia.

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布鲁金斯学会的克利夫·盖迪说，“假如你把西伯利亚与阿拉斯加以及加拿大北部的一些地方相比，那里一样有自然资源，但是没有过多的人口。”

"If you compare Siberia with Alaska and parts of Northern Canada, where there are also natural resources, you can see it's vastly overpopulated," says Clifford Gaddy of the Brookings Institution.

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至少有官方估计的埃克森公司在阿拉斯加瓦尔迪兹造成的灾害那么大。

That's at least as large as the official estimate of the Exxon Valdez disaster "in Alaska, he told the Associated Press."

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