Researchers say that stopping leaks of methane, a potent greenhouse gas, is a major untapped opportunity for combating climate change.<div><a href="http://www.nytimes.com/2015/04/22/world/americas/study-finds-low-cost-in-reducing-methane-emissions.html?partner=rssnyt&amp;emc=rss" target="_blank">Original link</a></div><div>Original author: JOHN</div>