Downside To Natural Gas

Natural gas produces nearly half as much carbon dioxide as gasoline.

"Carbon Dioxide Released By A Gallon Of Gas"
http://paxonbothhouses.blogspot.com/2014/05/in-photograph-above-thin-blue-band-is.html

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Natural gas alone isn't the magic answer. Hal Bernton in The Seattle Times.

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There's a downside to natural gas. "Conventional wisdom, strongly promoted by the natural gas industry, is that natural gas drives down American emissions of carbon dioxide, by substituting for carbon-rich coal. The climate stabilization plan announced by the Obama administration on Monday relies on that. But in other ways, cheap natural gas drives emissions up....Some of the factors are hard to quantify, making it uncertain whether, in the long term, natural gas's net effect is positive for climate control." Matthew L. Wald in The New York Times

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Natural gas won’t save us from global warming, study confirms. 
Max Ehrenfreund