Michael Gooseff follows water to the end of the earth. The Pennsylvania State University hydrologist works in remote regions of the Arctic and Antarctic, where ice and frozen ground are thawing. He expects polar warming and melting to continue at an accelerating pace if no significant reductions are made in climate-changing greenhouse-gas emissions.
The Arctic ice sheet has been melting at a decreasing rate for 15,000 years, since Chicago was buried a mile deep. No doubt it was all started by Hummers.