BPs decision to tap into the Canadian wilderness is "based on addiction, not reality," says Ann Alexander, senior attorney at the National Resource Defense Council (NRDC), a nonprofit environmental group. "Tar sands crude oil is dirty from start to finish. It's bad enough that [BP is] fouling our natural resources here in the Midwest, but it's completely destroying them up in Canada. There are good sources of energy we can turn to that don't involve turning entire forests into a moonscape.""It's in BP's interest to get around the need for a PSD permit," Alexander says. "They can potentially accomplish that either with real emissions reductions or with funny math."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 Une allows. Without action, it's empty rhetoric.