What is carrying capacity?
Carrying capacity is the environment's ability to provide for a population. Foxes need a certain population of rodents, whales need plankton.
Humans need...
It's interesting that primitive farmers could stay in the same place longer than hunter-gatherers, but degraded their territory more thoroughly. The farmers needed the materials and fuels for the technology they needed to farm, and because of the higher yields, there could be more of them, and all those hands were useful for farm chores.
21st century humans need...
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