Finance Minister Bill Morneau says the federal government is pushing ahead with its purchase of the Trans Mountain pipeline expansion despite a court ruling overturning approval of the project.

The opposition Conservatives today will again ask for an emergency debate in the Commons on the Trans Mountain pipeline situation.

Asthma, cancer, fire and contaminated water sources are among the risks the federal government needs to consider before approving the Kinder Morgan pipeline expansion, a new report urges.