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population population_policies Changing_population population_challenges human_trafficking migration thailand
geography population population_challenges refugees Places power
geography population population_challenges megacities urban_stress sustainable
geography population population_challenges migration refugees climate_change climate_consequences global_issues processes
geography migration population_challenges Changing_population thailand Global_interactions
population population_policies population_challenges fertility china one_child Places
geography population population_challenges refugees migration Changing_population power global_issues
population population_challenges Changing_population migration refugees global_issues power