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I taught world history. I understand there was an Ice Age... seasons come and seasons go. I do not believe the world's going to end because of the 2 percent man-made greenhouse gas emissions in the atmosphere. And even if it were, we're not going to stop it.

The entire North Polar ice cap is disappearing before our very eyes. It's been the size of the continental United States for the last 3 million years and now 40 percent is gone and the rest of it is going.

As technology keeps improving, the price of oil keeps rising, and the ice keeps melting, Arctic energy is bound to be an increasingly bigger part of the global mix.

I think we're going to carry the 'Ice Age's up to 'Ice Age 15,' which means basically they'll be in the present decade.

Like the canary in the coal mine, the climate changes already evident in the Arctic are a call to action.

As this body of knowledge has evolved, a much more critical job for researchers and scientists has evolved into explaining and educating policy makers and the public to the risks of global warming and the possible consequences of action or of no action.

Some studies suggest that the Arctic Ocean may be ice-free by the end of the century.

The prediction that glaciers will be gone from Glacier National Park has been moved up by 10 years to 2020, the same year it's predicted the Arctic Sea will be ice-free in the summer.

There's some politicians who still seriously believe that we haven't got global warming.