Pick Your Poison
 This "updated environmentalist's guide" from The Sierra Club provides brief profiles of the globe's largest oil and gas companies and ranks them according to their actions. From Citgo to Sunoco, each conglomerate comes under scrutiny for its "black marks," stance on global warming, and green initiatives. Some of the "green" details surprised us: ExxonMobil has donated more than $1 million to saving tigers. Shell leads the world in distributing biofuels. And BP no longer lobbies to open up the Arctic reserve. But the list of "black" details makes for one long, sorry tale of spilt oil, violations of emissions caps, associations with brutal governments, and at least one deadly pipeline explosion. Yet, as long as we drive cars that gulp fossil fuels, we need these firms. Knowing that, it doesn't hurt to have a clear understanding of their corporate record. Maybe it will help to determine where you fill up next time your car needs gas.
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