He voted against the McCain-Lieberman bill in 2005, but changed his mind after visiting Greenland to view the melting ice cap.

2005年他投票反对Mc Cain - Lieberman法案，但格陵兰岛之旅让他亲眼目睹了冰盖的融化、也使他对此问题有所改观。

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Note that there tends to be less warming over the massive Greenland ice cap.

FORBES: Is Global Warming A Bipolar Disorder?

But the volume of the Martian north polar cap is less than half that of the Greenland ice cap, and about four percent of the Antarctic ice sheet.

BBC: By BBC News Online Science Editor Dr David Whitehouse

Most of Greenland is covered by an ice cap, but the acceleration of Arctic melting is making it easier to tap the territory's resources.

BBC: Greenland rare earths: No special favours for EU