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population popolazione 2050 mondiale health growth 2030 2100 economic terra prospects crescita global billion projected abitanti gli growing quante diseases
population world facts 2050 prospects africa changing
population world un prospects facts europe changing might know not africa global medium
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world population prospects un facts fertility global africa europe per over might know not woman medium births agenda 1600
population united nations graphic world projections courtesy decline between usnews
population world un 2050 billion 2020s aging fertility will ageing people lower global life despite nearly universal hit rates over