The world’s population will hit 7.2 billion next month and 10.9 billion by 2100, with most of the growth a result of high birthrates in the developing world, the United Nations has said. The UN’s latest “World Population Prospects” report on Thursday said the number of people inhabiting the planet at the start of the next century could top 16.6 billion, or depending on the statistical model, could be as low as 6.8 billion. In either case, the population in the world’s poorest regions is anticipated to rise dramatically, the UN said.

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