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> In developed countries we already have stabilized our demographic growth, so I don't think there is a need for limiting oneself.

This presupposes that the current population density in developed countries is sustainable, with the foreseeable level of consumption per capita. Is it?

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Sustainability is a factor of the population times its emission. So the answer would depend on how much we can decrease our emissions.

If I had to guess, I don't think we will be able to reduce our emissions enough to sustain the population density of developed countries. But I am pretty sure that it could be doable if we took all the measures we could take.

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