“Is increased production of natural gas from shale deposits good for the environment? At first glance, yes: natural gas releases less CO2 into the atmosphere than coal, so replacing coal-fired electrical plants with gas-fired plants is a win for global warming. And since fracking makes natural gas cheaper, it helps stimulate a switch from coal to gas.
But wait: It turns out you also have to account for leakage. The problem is that natural gas is methane, a powerful greenhouse gas in its own right, and when you extract natural gas from shale formations, some of it inevitably leaks out. That’s decidedly badfor global warming. But David McCabe, an atmospheric scientist at the Clean Air Task Force, reports that the news is fairly good on this front:” “From the best of the collective work, we believe that burning natural gas for electricity produces about 30-50% less greenhouse gas than burning coal, even accounting for the emissions of methane (and carbon dioxide) from producing and transporting the natural gas.”
Read more: Mother Jones