But aren't these possibilities due to over-population rather than climate change?

Our total ecological footprint is less due to population and more to the way we fill up all and then some. Most of the worlds population is living on a sustainable level even at our current population, but white people are as a group way over the limit.

"Over-population" is a term that when uttered in relation to over current situation in my ears sounds like prioritizing the western lifestyle over poor people's lives. Not that I think you meant it that way.

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