Vast gas leakage shows up in US distribution system.

The EIA estimates that more than 8 billion cubic metres of natural gas are lost in the US each year between the point of production and homes: over 1% of total gas distribution, enough to scupper the global warming advantage of gas over coal via methane’s global warming potential. Thousands of previously unreported leaks have been mapped under the streets of Boston and San Francisco: as much as 15 times higher than the global background level.