Enbridge Inc. is a multinational energy transportation company headquartered in Calgary, Alberta. It focuses on the transportation of energy, primarily in North America. As a transporter of energy, Enbridge operates in Canada and the United States, the longest crude oil and liquid hydrocarbons transportation system in North America. Enbridge also has a significant natural gas transmission system, transporting 20 per cent of natural gas consumed in the United States and owns and operates Canada's largest natural gas distribution network, providing distribution services in Ontario and Quebec. Union Gas in Ontario now fully operates under Enbridge as well.