FROM BOB ZUBRIN, a fuel-efficiency wager. “Talk is cheap, so — in the tradition of Julian Simon’s famous 1980 wager with Paul Ehrlich and John Holdren that five crucial natural resources would not become dangerously scarce by 1990 — I am willing to back up my assertion with hard cash. I am willing to wager up to ten people $10,000 each that I can make my 2007 Chevy Cobalt run with substantially superior fuel economy on methanol than it does on gasoline.”