Economic DevelopmentEconomicsPolitical SystemsGross Domestic ProductDeveloping CountriesSocial PlanningChinaWorld HealthConservation of Natural ResourcesUrbanizationAgricultural IrrigationPopulation GrowthDeveloped CountriesSocioeconomic FactorsUnited NationsIncomeAgricultureAsiaIndustryFood SupplyEmigration and ImmigrationInternational CooperationPublic HealthEnvironmental HealthGeographyCommercePopulation DynamicsRural PopulationHong KongHealth PolicyAfricaBiodiversityEcosystemPovertyEnvironmental MonitoringPrevalenceSocial ClassModels, TheoreticalEnvironmentInfant, Newborn