Four lost cargo containers have washed up on Vancouver Island while more than 100 remain unaccounted for after breaking free from the MV Zim Kingston.

"If there were over 7,500 on the trail, you have to wonder how much of that plastic is actually in the harbour itself."

A barge filled with 40 tonnes of marine debris gathered by hundreds of volunteers from the west coast of Vancouver Island docked in Richmond Monday night. A portion of the debris collected, including fishing gear, industrial waste and Styrofoam, comes from the 2011 Japanese tsunami, which sent piles of marine garbage moving across the Pacific Ocean and to...