Enbridge Line 3 is a crude oil pipeline that runs from Alberta, Canada, to Wisconsin, USA. It is part of the larger Enbridge pipeline system and is designed to transport oil from the Canadian oil sands to refineries in the Midwest. The pipeline has been the subject of environmental and legal debates due to concerns about its impact on land, water, and Indigenous rights. The original Line 3 was built in the 1960s and required replacement due to aging infrastructure. The new pipeline, which was completed in 2021, follows a different route to reduce risks to sensitive areas. The project has faced opposition from various groups, including environmental activists and some Indigenous communities, who argue it poses environmental threats.