Daily Green: Rising gasoline prices brings usually bring bouts of worry about “peak oil,” the idea that petroleum supplies will peak and then inexorably decline, leading to price shocks. Recent studies have stirred up similar concerns about peak coal. Stop right there. Peak coal? Why would anyone worry about peak coal? Haven’t we been told that the U.S. is the Saudi Arabia of coal, with a domestic supply exceeding 200 years? Maybe not, if new information from the U.S. Geological Survey …