The tar sands – also called oil sands – are one of the largest remaining deposits of oil in the world. Developing the tar sands has created the biggest industrial development project, the biggest capital investment project, and the biggest energy project in the world. It has also created a literal hell on earth. These are videos recorded by Greenpeace activists with mobile phones while occupying a Shell's construction site that is part of the expansion of a tar sands upgrader facility - where tar-like bitumen is processed into dirty oil.