Comment The last 25% (Score 5, Informative) 368
The last 25%, left out of the summary, is the most concerning.
From the article:
The final 25% of the oil — the equivalent of four Exxon Valdez spills —- is of greatest concern to scientists. It is drifting 3,000 to 4,300 feet below the gulf's surface, in vast clouds of atomized droplets that could alter links in the chain of life.