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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.
Here's how much of the world would need to be covered in solar panels to power Earth. Solar energy is a seriously underrated resource. More power from the sun hits the Earth in a single hour than humanity uses in an entire year, yet solar only provided 0.0039% of the energy used in the US last year. Visionaries like Elon Musk think that solar will become the biggest energy source by 2031, according to an interview with Tim Urban on Wait But Why.