Are we still on track for 9 billion people on Earth in 2050?
Earth & Sky - Austin,TX,USA
The most often quoted population number of 9 billion by 2050 comes from the United Nations Population Division . As Engleman points out in his article, ... (4 October 2009)
Showing posts with label Earth and Sky. Show all posts
Showing posts with label Earth and Sky. Show all posts
11 October 2009
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