It's getting harder to build an oil pipeline in Canada.
In 2013, when TransCanada Corp. proposed a cross-country pipeline that would be among the longest in the world, the Conservative Party was in power and the project's approval seemed a given.
But the new Liberal government of Prime Minister Justin Trudeau is now requiring pipeline projects to pass a more stringent environmental review, including a climate test to determine how it would affect greenhouse gas emissions.
That change represents a major shift in environmental policy in Canada following nearly a decade of Conservative rule under Prime Minister Stephen Harper.
Vowing to make Canada an "energy...