After more than a decade, the Trans Mountain pipeline expansion project (TMX) has finally been completed. One of the country’s biggest infrastructure projects is seen as a major win for Albertan oil producers, with nearly 600,000 extra barrels shipped daily, ready for international buyers.

But the future ownership of the pipeline remains up in the air. Many of the issues and questions that delayed the project – concerns over its safety and the environment, fights over Indigenous land rights, long-term economic risks – remain.

Jeffrey Jones, The Globe’s sustainable finance reporter, explains the ballooning costs of the TMX and why one of Canada’s top exports is creating tension with its future climate targets.

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