{Editors Note} In the SeptemberOctober 2001 issue, Sierra published Pick Your Poison: An Environmentalists Guide to Gasoline, by Jennifer Hattam and Paul Rauber, in which we tallied the pluses and minuses of the largest U.S. oil companies. Since then, continued consolidation in the industry has further shrunk the field, and new oil spills and pollution releases have blackened some carefully greenwashed reputations.

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