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 162000 TWh of energy. [3]