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The World at 7 Billion People: How Much More Growth Can the Planet Support?

With global population expected to surpass 7 billion people this year, the staggering impact on an overtaxed planet is becoming more and more evident.

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Robert Engelman is executive director of the Worldwatch Institute, an environmental research organization based in Washington, D.C. The Population Institute awarded his book, More: Population, Nature, and What Women Want, the Global Media Award for Individual Reporting in 2008.