From a tweet by Arik Ring
Earth Receives Enough Sunlight Every Day to Meet All of Humanity's #Energy Needs 10,000 Times Over.
The tropics could be powered by solar, and high latitudes by solar in low latitude countries --- for example, solar from Morocco for Europe. And that's just sunlight; concentrated solar power (CSP) uses the infra-red spectrum as well as the visible spectrum. We could run continent-wide electricity grids using a mix of wind, solar, CSP and batteries. Easily.
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