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Comment and Society

How shrinking populations could help to save our planet

Our ability to exert conscious control over our family sizes is unique – and can be transformational, says Christopher Wills

By Christopher Wills

21 August 2024

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

Elaine Knox

In 1968, husband and wife biologists Paul and Anne Ehrlich published The Population Bomb, a terrifying look at coming ecology-driven disasters. Our population growth, they said, had to be slowed or reversed, or else catastrophe would ensue.

The world’s population has more than doubled since that time, to over 8 billion people, and the disasters are still looming. But now, a new factor has entered the picture, one that has never been seen before in the entire history of life on our planet.

Italy’s population has shrunk by around a million since 2014. Japan’s has fallen by about 5…

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