I generally like to promote positive news. However, in particular, because below article is published by the New York Times, which I regard as a quality newspaper, I have to speak up against this fearmongering.
Scientifically, the article is ill researched and appears to be a marketing piece for the company offering to detect natural gas leaks (BTW, nothing wrong with measurements to improve gas network performance and safety).
In essence, and please read Richard Muller's excellent piece about "Fugitive Methane and Global Warming" (http://static.berkeleyearth.org/memos/fugitive-methane-and-greenhouse-warming.pdf
), even if 14% of methane was leaking, which economically and regarding health and safety unacceptable, using methane is still environmentally better than burning coal. The truth is gas leaks do contribute, yes, but very, very little to global warming!
I haven't done the math, but I would guess that eating a couple of Hamburgers less will generously compensate your private contribution to global warming by gas leaks from our distribution networks.
Trust the New York Times will do better next time.