Very interesting description of how to squeeze every last photon of energy out of solar energy.
You may have to read the next sentence twice to really take in the magnitude of it.
20:00 "470 exajoules* of energy reach the Earth's surface every 8 minutes, which is the same amount of energy that the entire world's population uses in a year."
*An exajoule is 10^18 joules, equivalent to 277.8 terawatt hours
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