Trans Mountain Pipeline

The court said the government has adequately consulted with indigenous groups about the pipeline expansion. First Nations have said that they remain concerned about the project's environmental impact.

Prime Minister Justin Trudeau first approved the project, which is opposed by many environmental groups, in 2016, but Tuesday's announcement means construction can begin later this year.

An appeals court sided unanimously with environmental and indigenous groups in the decision; for construction to resume, the government must comply with court orders that could take years to satisfy.