> 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

> 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/whats-the-highest-population-the-earth-could-possibly-sustain https://worldbuilding.stackexchange.com/questions/19441/what... [1] https://www.youtube.com/watch?v=XAJeYe-abUA https://www.youtube.com/watch?v=XAJeYe-abUA