Blue and Green: Not even a global one-child policy or a devastating third world war would reduce the human population to sustainable levels, a study has found.
The paper, published in the Proceedings of the National Academy of Sciences, concludes that population controls or a global disaster cannot stop the global population reaching 10 billion or more by 2100.
A conflict on the scale of the first two world wars would barely register a blip on the population trajectory, while restrictions on the numbers of...