The oil giant BP [3] has spent hundreds of millions of dollars on PR, greenwashing [4] its image to be perceived as better than Exxon [5], Shell [6] and others. But "a recent change in corporate policy threatens that green-friendly image," reports Michael Moreci. That change is BP's full-throttle attempt to mine oil from vast areas of tar sands in the Canadian wilderness, an especially destructive way to produce fossil fuel. "Tar sands extraction isn't just another hurdle for environmentalists to combat. It merely reveals a simple truth: when it comes to 'being green,' even the most publicly boastful of the oil corporations -- such as BP -- will keep their promises only as far as their bottom line allows."