Energy: A new study shows that little methane, a strong greenhouse gas that occurs naturally in ground water, is released into the atmosphere during hydraulic fracturing. So it must be OK to frack now. In the first "Gasland" movie, environmental activist Josh Fox trumpeted flaming water taps in a Colorado town as evidence of fracking-induced water contamination. In fact, the areas in question had reported naturally occurring methane in their water for decades. Whether naturally occurring or not, environmentalists claim that fracking would release huge amounts of what they consider the most potent heat-trapping greenhouse gas, far outweighing the value...