refineries and ports for export. The proposed pipeline would cross 1,073 rivers, lakes, streams, and the Ogallala aquifer. The Ogallala aquifer is one of the largest in the world. It provides two million people with drinking water and more than a quarter of America’s agriculture with water for irrigation. There would be a large ecological impact, affecting communities and destroying habitats. Building Keystone XL would add 27.4 million metric tons of carbon pollution to the atmosphere per year, adding to