Source: C.A. Smith, R.D. Belles, and A.J. Simon. March 2011. Estimated International Energy Flows 2007 (3.9MB PDF). Lawrence Livermore National Laboratory.
2011. Development of Energy, Emission and Water Flow Sankey Diagrams for the Province of Alberta Through Modeling Final Report. April 11, 2011. Amit Kumar, Veena Subramanyam, Md Ruhul Kabir. Department of Mechanical Engineering, University of Alberta.Sankey diagrams (click on links for interactive diagrams):