There are two ways to look at world population numbers.
By one measure, the world has grown beyond its capacity. As Hillary Rodham Clinton's science advisor, Nina V. Fedoroff, recently told the BBC: "The planet can't support many more people."
By one measure, the world has grown beyond its capacity. As Hillary Rodham Clinton's science advisor, Nina V. Fedoroff, recently told the BBC: "The planet can't support many more people."
But in parts of Europe and other developed countries, the problem isn't too many people but too few: Dwindling birthrates have prompted concerns about whether a shrinking pool of young people will be able to maintain the social safety net for the previous generation.
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