A similar number here in DC as Boston.........interesting.........

They began similar work in Boston in 2011, and found it had a similar number of leaks per mile as Washington, D.C., but at lower concentrations. They've since put instruments atop some of Boston's buildings, including the Prudential Tower, to measure methane in the atmosphere.

Jackson says they hope to do the same in the nation's capital although its buildings are shorter. He says both Boston and Washington, D.C., because they're older, are likely leakier than younger cities.