To: Wharf Rat who wrote (260818 ) 9/19/2014 12:26:05 PM From: bentway Read Replies (1) | Respond to of 542087 Global population may reach 11 billion by 2100rt.com The world’s population may reach 11 billion by 2011 - 2 billion more than previously anticipated - largely due to high birth rates on the African continent, according to a UN-led study. Can natural resources keep pace? Researchers have long held the view that the number of people on the planet would grow to just 9 billion by 2100, and then stabilize or even decline. The latest analysis, however, indicates global population will increase by 4 billion by century’s end, according to a report published in Science journal. "The consensus over the past 20 years or so was that world population, which is currently around 7 billion, would go up to 9 billion and level off, or probably decline," said co-author Adrian Raftery, professor of statistics and of sociology at the University of Washington. "We found there's a 70 percent probability the world population will not stabilize this century," he added. Much of the reason for the predicted population growth comes from Africa, where the population is expected to quadruple from 1 billion today to 4 billion by 2100. "There is an 80 percent chance that the population in Africa at the end of the century will be between 3.5 and 5.1 billion people," said the study. Global population is currently increasing at a rate of about 1.14 percent annually, while the average population change is estimated at about 80 million more people per year. The global population has doubled in 40 years from 1959 (3 billion) to 1999 (6 billion), according to World Population Clock . It is now estimated that it will take another 43 years to increase by another 50 percent, reaching 9 billion by 2042. Additionally, by 2030 India's population is expected to surpass China's, to become the most populous nation in the world. Meanwhile, Nigeria's population is predicted to surpass America's population by around mid-century to become the third-most populous country, reaching about 1 billion people in 2100...