World population will reach 11 billion by 2100 and it was highly unlikely that global population will stabilize by the end of 2100. This was revealed by a UN study titled World population stabilization unlikely this century. The study was published in the online edition of Journal Science on 18 September 2014.
The UN study projected the population growth on basis of data until 2012 and a Bayesian probabilistic methodology. Analysis of these data reveals that, there is an 80 percent probability that world population, now 7.2 billion, will increase to between 9.6 and 12.3 billion in 2100.
Main Highlights
• The World will have 2 billion more people on Earth than expected due to high birth rates in Africa.
• Sub-saharan Africa is anticipated to be the fastest growing region, with population to rise from one billion in 2014 to four billion by 2100.
• There is an 80 percent chance that the population in Africa will be between 3.5 and 5.1 billion people by 2100.
• In Asia the population is projected to peak at around 5 billion people in 2050 and then start decline.
• The North America, Europe, and Latin America and the Caribbean are all expected to be under one billion each.
• The issue of ageing population will also affect countries whose populations are very young today. Brazil, for example, currently has 8.6 people of working age for every person over 65, but that will fall to 1.5 by 2100, well below the current level in Japan. China and India will face the same issue as Brazil.
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