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What is the Trans Mountain pipeline?

B.C.'s incoming government is opposed to the Kinder Morgan pipeline expansion while Alberta supports it. Here's what you need to know.

Pipeline pits B.C.'s new NDP government against Alberta's

Kinder Morgan's expanded pipeline through B.C. and Alberta will triple its carrying capacity 3:53

It may have taken some time but eventually B.C. Premier Christy Clark gave the green light to Kinder Morgan's Trans Mountain pipeline.

Now, with a new NDP government taking power on Tuesday, pipeline politics could once again come to the forefront with B.C. and Alberta on opposing sides. 

Premier-designate John Horgan and Green Party Leader Andrew Weaver are opposed to the project. In announcing their alliance, both have said they would use every tool they can to stop it.

On the other side is  Alberta Premier Rachel Notley and the federal government who say the expansion of the pipeline is in the national interest.

The pipeline would twin the existing 1,150-kilometre pipeline that runs from the Edmonton area to Burnaby, B.C., nearly tripling its capacity to 890,000 barrels a day.

Watch the video above to learn what will change with the expanded pipeline.