Well shit...

AIRBORNE RESEARCH SHOWS EAST COAST CITIES EMITTING TWICE AS MUCH METHANE AS ESTIMATED

Now, a new NOAA and University of Michigan study using an instrumented airplane has found unexpectedly large emissions over five major cities along the East Coast - twice the total amount of methane and almost 10 times the amount estimated from natural gas. The work was published in the journal Geophysical Research Letters.

[link to research.noaa.gov (secure)]