Farmers harvest cranberries born from the University of Wisconsin-Madison's breeding program. The program has created a couple commercial varieties since it's inception. Jeff Miller/University of Wisconsin-Madison hide caption

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Though it's considered a classic Midwestern dish, Green Bean Casserole was actually born in a Campbell's test kitchen in New Jersey 60 years ago. Love it or loathe it, the dish has come to mean more than just a mashup of processed food. Bill Hogan/TNS /Landov hide caption

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Harvesting sweet potatoes: Workers sort the potatoes in the field, collecting small and large ones in different buckets. Each bucket weighs 30 pounds or so. A worker will shoulder that bucket and dump it into a flatbed truck 400 to 500 times a day. It's a daily load of six or seven tons of sweet potatoes. Dan Charles/NPR hide caption

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The Beijing Environment Exchange, one of seven emissions trading pilot programs in China, may be part of a nationwide carbon market by as early as 2017. Anthony Kuhn/NPR hide caption

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Gov. Jerry Brown (left) meets with Prime Minister of India Narendra Modi in San Jose, Calif., on Sept. 27. Brown has been brokering his own international agreement on climate change. Jeff Chiu/AP hide caption

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French police patrol near the Eiffel Tower in Paris on Monday. France is the most-visited country in the world, but the number of tourists has dropped off since the Nov. 13 attacks that killed 130 people. Jacques Brinon/AP hide caption

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