Plotting Potential for Renewable Energy. By David J.C. MacKay, NYTimes, August 28, 2009. "The average energy consumption on earth is 56 kilowatt-hours per day per person. You can visualize this personal energy consumption in terms of light bulbs: 56 kilowatt-hours per day is the energy consumption of 56 ordinary 40-watt bulbs left switched on all the time. The world's population density is roughly 50 people per square kilometer, or 0.4 square mile. Countries, of course, vary significantly around the world average. When considering the potential of renewables to power a country, it's critically important to know that country's power consumption per unit area. The graphic accompanying this article plots where a variety of countries fall on the scale."
2009-09-06
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