There is presumably an upper limit to the carrying capacity of humans on earth-of the numbers that agriculture can support-and that number is usually estimated at between 13-15 billion, though some people think the ultimate numbers might be much higher. (Niles Eldredge)

There is presumably an upper limit to the carrying capacity of humans on earth-of the numbers that agriculture can support-and that number is usually estimated at between 13-15 billion, though some people think the ultimate numbers might be much higher.

Niles Eldredge

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