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[–]Q-Continuum-kin 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

It's not sustainable having more than half the world's population living in cities.

I believe that civil engineers say the exact opposite. I hate cities myself but from a planning perspective there just isn't enough land to give the billions of people in the world their own land.