One from Canada, now but which involves American interests. The Keystone Pipeline is a system of pipes from Canada to America, transporting crude oil to American refineries. The fourth phase of the whole project proposed a pipe from Alberta to Nebraska but has met with protests from environmentalists, as the route takes in the Ogallala Aquifer (a large fresh water reserve) and the Sandhills wetland, home to many delicate species of plants and animals. The idea was also stalled by lawsuits from various parties involved. The project is still a possibility, but the Canadian government are seriously rethinking their position on whether it is an “essential” part of Canada’s future oil expansion plans.