World population is currently growing by 1.1 percent annually. As shown in the chart above, nearly all of this population growth is occurring within developing countries. As a result, roughly 9 in 10 children (1.6 billion total children) under the age of 15 currently reside in developing parts of the world, up from 7 in 10 in 1950 (EarthTrends and UNPD). By 2050, total population is expected to reach 9.1 billion (medium projection) despite overall declines in population growth rates. Major growth is expected to occur in developing countries' urban populations; assuming current trends "poor countries will have to build the equivalent of a city of more than one million people each week for the next 45 years" (Cohen, 2005). Limited access to health care, contraception, and educa! tion in many of these countries has resulted in national demographic trends that exhibit stark contrasts to those of the industrialized world (e.g., fertility rates), leading to high population densities in developing regions of Africa and Asia (see map).
Global Population Density. Data are for 1995. For more information, please see the full source notes.