About that environmental disaster in the Gulf? Never mind.

The Gulf of Mexico suffered remarkably little damage. Why were so many so willing to believe otherwise?

by Robert H. Nelson

...the ecosystem of the Gulf itself turns out to have suffered remarkably little damage from the continuous gushing of oil into the water from April 20 till July 15, when the leaking well was capped. One group of scientists rated the health of the Gulf’s ecology at 71 on a scale of 100 before the spill and 65 in October. By mid-August, the National Oceanic and Atmospheric Administration (NOAA) was having trouble finding spilled oil. This squared with the finding of researchers from the Lawrence Berkeley National Laboratory in California that the half-life of much of the leaking oil was about three days. At that rate, more than 90 percent would have disappeared in 12 days.

NOAA explained one reason for this in a report in August: “It is well known that bacteria that break down the dispersed and weathered surface oil are abundant in the Gulf of Mexico in large part because of the warm water, the favorable nutrient and oxygen levels, and the fact that oil regularly enters the Gulf of Mexico through natural seeps.” In other words, the organisms that normally live off the Gulf’s large natural seepage of oil into the water multiplied extremely rapidly and went on a feeding frenzy. Another 25 percent of the spilled oil—the lightest and most toxic part—simply evaporated at the surface or dissolved quickly.

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