The Washington Post

Let's start with some slightly, okay, more than slightly depressing numbers: Since the devastating explosion on BP's Deepwater Horizon rig almost three weeks ago, more than 1.7 million gallons of oil have spilled into the Gulf of Mexico and more than 250,000 gallons of chemical dispersant have been sprayed onto that spill in an effort to contain the damage. Everyone agrees that it's the enormous slick of oil that we should really worry. But in the last week, questions have also been raised about the cleaning chemicals flooding into the Gulf. Although the amount pales, as they say,…