A Sticky Situation for TransCanada's Keystone XL Pipeline
Environmental activists have long criticized the production of tar-sands oil; this especially dirty form of fuel demands tons of energy to obtain and results in high greenhouse gas emissions, not to mention the toxic wastelands its extraction leaves behind. But a new report, "Tar Sands Pipeline Safety Risks" (PDF), looks more closely at the environmental costs associated with the oil's transportation—which might soon run straight down the middle of the continent. A proposed TransCanada pipeline, the Keystone XL, would carry billions of gallons of crude tar sands oil from Canada into the US. This raw oil—more corrosive, volatile, and acidic than the upgraded synthetic tar-sands oil we've become used to—would flow from Alberta to Houston, through some valuable wetlands and aquifers in the Midwest.