Oceanographer: Methane gas astonishingly high

Carried by Reuters:

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And this from AOL:

The dangerous gas has played an important role throughout the disaster and response. A bubble of methane is believed to have burst up from the seafloor and ignited the rig explosion. Methane crystals also clogged a four-story containment box that engineers earlier tried to place on top of the breached well.Now it is being looked at as an environmental concern.