Many of the most articulate opponents of a proposed pipeline project will gather at Vancouver City Hall today.

The No Consent, No Pipeline: Stop Kinder Morgan TMX Pipeline March and Rally begins at noon. At 12:30 p.m., participants will march to the Cambie Street Bridge.

From there, they'll drop a banner and then walk to Library Square at the corner of Homer and West Georgia streets.

"The proposed Kinder Morgan Trans Mountain pipeline expansion will seriously impact the title and rights of First Nations communities, will have a lasting and damaging impact on the environment and communities it passes through, will increase tanker traffic and the risk of a major environmental disaster to B.C.’s coasts, and will increase Canada’s contributions to climate change at a most critical time when any expansion of the tar sands is entirely unacceptable," the organizers said in a statement. "Canada’s final decision on the KM TMX project is imminent."

First Nations speakers at the rally include Grand Chief Stewart Phillip of the Union of B.C. Indian Chiefs, Squamish First Nation chief Ian Campbell, Musqueam activist Audrey Siegl, Tsleil-Waututh activist Cedar Parker, Secwepemc activist Jody Leon, and Indigenous Environmental Network rep Melina Laboucan-Massimo.

Phillip will lead a pledge to resist the pipeline and call on the prime minister to halt the project. If approved, the pipeline would triple shipments of Alberta bitumen to the Lower Mainland, reaching 900,000 barrels a day, which would be exported through Burrard Inlet on more than 400 tankers per year.

The following politicians will also take the podium: Green Party of Canada Leader Elizabeth May, Burnaby mayor Derek Corrigan, Burnaby South NDP MP Kennedy Stewart, and Vancouver councillor Andrea Reimer.

The president of Unifor Local 601, Ross Day, is also on the speakers list. He heads the local that represents refinery workers at the Chevron plant in Burnaby.