In just a dozen years, the Earth has added a billion people, putting us at the cusp of 8 billion—and demographers say we’re headed toward 9 or even 10 billion.
How will everyone get fed? How will everyone live, particularly as temperatures and oceans rise from climate change? The growth is happening as two parts of the world going in different directions, with baby booms in Nigeria and a sharp decline in China (which will soon be surpassed by India, pictured above, as the world’s most populous nation).
So far, our world, 7 billion people more numerous than in 1804, has handled the growth. But for how much longer?
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