Just remember it has NOTHING to do with "protecting the environment".
It's CORPORATE WARFARE. The oil will still be transported at the same levels.

It's the METHOD by which it's transported that is of interest here. Warren Buffet loves choo-choo trains and to keep his boyhood fantasy alive they need to be profitable in order to keep running, that means shipping oil. This is all so the oil can be moved by rail, rather than pipeline.