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12.2 trillion watt-hours converts to 12,211 gigawatt-hours, and based on 8,760 hours per year, and 197 million square miles of earthâs surface (including the oceans), the earth receives about 274 million gigawatt-years of solar energy, which translates to an astonishing 8.2 million âquadsâ of Btu energy per year.
The amount of solar energy intercepted by Earth in one minute is approximately equal to the total electrical energy artificially generated on Earth in an entire year. 20. Does Earth receive the same amount of solar energy all the time?