title: The day the world population reached five billion--July 11, 1987.
mesh_terms: D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D004467:Economics; D005060:Europe; D005544:Forecasting; D011153:Population; D011157:Population Dynamics; D011158:Population Growth; D012106:Research; D013223:Statistics as Topic
keywords: Demographic Aging; Demographic Factors; Developed Countries; Developing Countries; Economic Conditions; Economic Factors; Estimation Technics; Europe; Macroeconomic Factors; Population; Population Decrease; Population Dynamics; Population Growth; Population Projection; Research Methodology; World