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FYI, total global energy production is a lot less than 10^21 J. It's south of 10^19 from what I can google...


Depends on which aspects of energy production you're concerned with and over what time period. Global marketed energy production is about 18 terawatts, which is about 10²¹ J every year and 9 months. The energy globally produced by sunlight hitting the Earth, mostly as low-grade heat, is on the order of 100 petawatts, which is 10²¹ J every hour and a half or so. Global agriculture is in between these numbers.




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