Solar Income

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Area of earth's surface perpendicular to sun -
Average insolation - 1000W [1]
Radius of Earth - 6371 km - [2]
Pi Arr Squared is 1.3x10^14 square meters
Solar income is 1.3x10^17 watts upon the earth surface at any time.

Kardashev Scale

In 2017, we used 162,000 TWh of energy. [3]
There are 8,760 hours per year.
Thus, average power use is 18 TW.
18E12/

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