The Examiner has a notable report on an EPA study revising downward the methane leaked during natural gas production operations:  "'The scope of the EPA's revision was vast. In a mid-April report on greenhouse emissions, the agency now says that tighter pollution controls instituted by the industry resulted in an average annual decrease of 41.6 million metric tons of methane emissions from 1990 through 2010, or more than 850 million metric tons overall. That's about a 20 percent reduction from previous estimates. The agency converts the methane emissions into their equivalent in carbon dioxide, following standard scientific practice. *** The EPA revisions came even though natural gas production has grown by nearly 40 percent since 1990.'"  (Emphasis is ours.)

For more, see here (EPA:  "National Greenhouse Gas Emissions Data").