Worrying world population

19 September 2014
Presented by Chris Smith.

EARTH

"The Blue Marble" is a famous photograph of the Earth taken on December 7, 1972, by the crew of the Apollo 17 spacecraft en route to the Moon at a distance of about 29,000 kilometres (18,000 mi). It shows Africa, Antarctica, and the Arabian Peninsula.

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World leaders had been planning for a world population of about 9 billion by 2050. But now a new analysis, based on fresh data and more advanced statistical methods, suggests that this estimate might be wildly inaccurate and that the real figure might be more than 12 billion, which means population policy might need a major rethink. Adrian Raftery at the University of Washington is the author of the new study...

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