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What Fuels Fat

The human body's ability to store energy as fat seems haywire in a world full of food. Understanding how our complex energy-regulating systems can falter and lead to obesity is revealing new ways to fight excess weight

By Jeffrey S. Flier and Eleftheria Maratos-Flier

The World Is Fat

More people in the developing world are now overweight than hungry. How can the poorest countries fight obesity?

By Barry M. Popkin

Still Hungry

One eighth of the world's people do not have enough to eat

By Per Pinstrup-Andersen and Fuzhi Cheng

Sowing a Gene Revolution

A new green revolution based on genetically modified crops can help reduce poverty and hunger—but only if formidable institutional challenges are met

By Terri Raney and Prabhu Pingali

Can Fat Be Fit?

A well-publicized study and a spate of popular books raise questions about the ill effects of being overweight. Their conclusions are probably wrong

By Paul Raeburn

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