The world population situation.
D001723:Birth Rate; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D005298:Fertility; D005843:Geography; D011153:Population; D011157:Population Dynamics
Birth Rate; Demographic Factors; Demographic Transition; Developed Countries; Developing Countries; Fertility; Fertility Measurements; Geographic Factors; Population; Population Dynamics; Spatial Distribution