Not green at all, reports a study suggesting that the methane released by fracking and drilling makes it worse than coal.
Researchers at Cornell University are raising alarms over the expected increase in use of natural gas from shale deposits. They argue that replacing coal and gasoline with natural-gas alternatives could worsen, rather than improve, the impact of greenhouse gases. The greenhouse-gas footprint of shale gas over a 20-year period is at least 20 percent higher than that of coal and "perhaps more than twice as great," they say in a study published online in the journal Climatic Change. The culprit is the leakage of methane, the main component of natural gas.
Source: http://feeds.technologyreview.com/click.phdo?i=ebbbfaaff81048f752c25f9dd8dcecd4
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