The micro-organisms were apparently stimulated by the massive oil spill that began in April, and they degraded the hydrocarbons so efficiently that the plume is now undetectable, said Terry Hazen of Lawrence Berkeley National Laboratory.
via reuters.com
While I would never encourage people to be cavalier with our home planet. I would like to (again) point out that her ability to adapt and compensate for disasters is *always* underestimated.