A major spill from the pipeline or a tanker would have long lasting repercussions on the Lower Mainland coast - OR the North coast.  For example, the Skeena, Stikine and Fraser all have great salmon runs that would be affected IF there was a spill.    IF Canada needs heavy oil pipelines (and I am not convinced), why put the pipeline thru an area with more than 2 million people versus the North Coast (population in 2015 - Kitimat-Stikine: 38 621 or Skeena-QC:17 533)?