ef='http://www.time.com/time/specials/packages/article/0,28804,1986457_1986501_1986443,00.html' target='_blank'>(See the world's top 10 environmental disasters.)</a></span></p>
<p>Here's how UGA tallied the oil-spill totals. First, the researchers discounted the 800,000 or so bbl. &#151; about 17% of the total amount spilled &#151; that were captured by BP at the wellhead, on the grounds that the oil never entered the Gulf. (The government report includes the 800,000 bbl., which somewhat inflates its number