The process to generate energy using the Canadian tar sands is particularly dirty, producing one of the most noxious fossil fuels on the planet and leaving a devastated landscape in its wake. Keystone XL also exposes a huge swath of the continent, including much of the water table, to a persistent contamination threat. We incur this environmental cost at very little economic benefit. According to the State Department, Keystone XL would create 35 permanent jobs. Moreover, there's no evidence that the project will produce any secondary benefits to our economy. The oil is produced in Canada, shipped across the U.S., and then shipped out into the world oil market.