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Monthly Archives: May 2010

How much coal is required to run a 100-watt light bulb 24 hours a day for a year?

photo credit: brewbooks How many of us have a clue about how much a kilowatt is. Check out Marshall Brain’s article, “How much coal is required to run a 100-watt light bulb 24 hours a day for a year?” You can also get the podcast from iTunes.