Oil companies have not yet fulfilled promises to develop new technologies to treat toxic water in the tailing ponds, and fears exist that this dirty water will sit there for decades, leaking toxic water.
Nine weeks ago, oil near a tar sands extraction site in Alberta, Canada, began to leak and ooze from the ground, blackening vegetation and killing wildlife, and it shows no signs of stopping.
Whether the explosion's origins lie in criminal activity or not, the train crash follows a string of oil-related disasters this year, indicating how risky oil transport is.
In the wetlands of northern Alberta, Canada, outside the town of Zama City, everything is stained with the thick, pungent blackness of oil.
In Canada, thousands of protesters flooded the lawn of the British Columbia Legislature building in Victoria for a "Defend Our Coast" demonstration.