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The US-based Population Reference Bureau (PRB) has predicted that the bulk of the world's population growth will occur in developing nations by 2050, despite higher rates of HIV/AIDS and infant mortality.
In its latest report, the 2004 World Population Data Sheet, PRB said a 50 percent population increase by that period would result in nearly 9.3 billion people globally.
The report noted that the number of people in the developing world was expected to rise by 55 percent to more than 8 billion, while the developed world's population would rise by 4 percent to more than 1.2 billion.
According to the PRB projections, HIV prevalence in Africa, which is already decreasing in 14 of 38 nations, was expected to peak in about 10 to 15 years.
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