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by __HYde 2580 days ago
> I don't think there is a hard limit on number of people.

Humans through our metabolic process generate waste heat and Earth can only radiate so much so that does put a hard cap, albeit one much higher than people generally image, but a cap nonetheless. If we assume only the heat generated by our metabolic process that puts the limit over 250 trillion[0] but if we account for energy for food and industrial purposes that puts the limit closer to 10 trillion[1].

[0] https://worldbuilding.stackexchange.com/questions/19441/what...

[1] https://www.youtube.com/watch?v=XAJeYe-abUA