Sketch the Human Development Index (HDI) (y-axis) vs. Per Capita Energy Use (x-axis) for the countries of the world. Explain what HDI is. Explain what Per Capita Energy Use is and how it is calculated. Comment on the various aspects of this graph (i.e. why some are nations so high in Per Capita Energy Use, why others are so low, what is an optimal Per Capita Energy Use, among other things). Give your opinion on global justice issues related to this data.