Future of Global Population Numbers Unknowable

 Future of Global Population Numbers Unknowable

How many people will inhabit the planet before population growth finally levels off? The figure most commonly used is 9 billion by 2050, up from 6.7 billion today — an extraordinary number, considering that there were only 1 billion humans in 1830. (Right now there are a billion people just between the ages of 10 and 19.) But there’s a growing debate about this projection and what it means.

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