I grew up on a small farm in southeastern China in the 1960s. A scene out of The Good Earth, my family and I raised chickens and pigs and eked out rice and wheat on a small plot about half the size of a football field. Some years we were able to feed ourselves, but mostly we were poor and hungry. Hunger, we now know, results not from food shortages but from policy failures. As people look to climate talks in Paris, my hope is that the negotiators will consider policy changes to the world's agricultural system to help us deal with rapidly changing climate as well as unacceptably high rates of hunger. Every day, 800 million people, mostly in Africa and Asia, still go to bed hungry. And even...
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