Sulphur stacks at tar sands upgrader with standing pool of molten sulphur

Fort McMurray, Canada

Sulphur is the source of significant pollution when it is burned, so it must be removed from any fuel source prior to distribution. The USA currently satisfies about 20% of its gasoline needs from the tar sands, and a pipeline is nearing completion for transport of this dirty crude from Alberta Canada to refineries on the hurricane prone Gulf Coast of the the USA.