Firstly, I'm guessing that there are exaggerations about some of the effects of increased oil tanker traffic in the Salish Sea. (critical-angle.net)
The oil tankers are part and parcel with Enbridge's proposed Northern Gateway pipeline project, which would deliver bitumen from Alberta to an expanded Kitimat port, and on to Asia, and would end a long - standing moratorium on oil tanker traffic on the B.C. coast. (thetyee.ca)
Kinder Morgan has been granted permission to expand its pipeline from Alberta to the B.C. coast with a resulting increase in oil tanker traffic in coastal waters. (thetyee.ca)