The US Senate, the upper house of the US Congress, is soon expected to vote on whether to support the Keystone pipeline.
If approved, the pipeline would transport hundreds of thousands of barrels of oil each day from Canada to refineries in the US' Gulf Coast.
The House of Representatives, the lower house, adopted its own bill last Friday and President Barack Obama will come under high pressure if Senate passes its bill too.
Al Jazeera's Daniel Lak reports from Calgary, Canada's biggest oil town.
Source: Al Jazeera