The Earth's Long Term Carrying Capacity Is Half a Billion

You said that you don't think kirston is right that the earth's long term carrying capacity is half a billion. Why not? Because he's neglecting several factors, says John MacIntosh. He was forming his ideas in the 19 sixties and 19 seventies when overpopulation was a big scare. If we ever hit the surface maximum number of inhabitants,. we can just move some people off world and colonize other places in the solar system.