Fraction of Available Solar Energy That Humans Currently Use

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  • Humans use 18TW in 2012 [1]
  • The energy from the sun that comes to the earth is pi*r^2*1000W = (6.4^6m)^2 * pi * 1000 W = 1E17 Watts
  • 1E17 Watts is: giga is 9, tera is 12 - so 5000
  • Ladies and gentlemen, we can still have 10-100x more people, and use 50-500x less than our allowance.