Visualizing How A Population Grows To 7 Billion–LISTEN–

http://www.npr.org/2011/10/31/141816460/visualizing-how-a-population-grows-to-7-billion

The U.N. estimates that the world’s population will pass the 7 billion mark on Monday.

Much of that growth has happened in Asia — in India and China. Those two countries have been among the world’s most populous for centuries. But a demographic shift is taking place as the countries have modernized and lowered their fertility rates. Now, the biggest growth is taking place in sub-Saharan Africa.

Due in part to that region’s extreme poverty, infant mortality rates are high and access to family planning is low. The result is high birth rates and a booming population of 900 million — a number that could triple by the end of the century. Population expert Joel Cohen points out that, in 1950, there were nearly three times as many Europeans as sub-Saharan Africans. If U.N. estimates are correct, there will be nearly five sub-Saharan Africans for every European by 2100.

As NPR’s Adam Cole reports, it was just over two centuries ago that the global population was 1 billion — in 1804. But better medicine and improved agriculture resulted in higher life expectancy for children, dramatically increasing the world population, especially in the West.