lettuce lettuce

Vegetables were rationed at supermarkets in the U.K. due to poor weather conditions in Europe. Here, lettuce, broccoli and zucchini were rationed at a Tesco store in London. Victoria Jones/PA Images via Getty Images hide caption

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Victoria Jones/PA Images via Getty Images

A Caesar salad kit. Americans buy twice as many packages of bagged salad greens as heads of lettuce these days. Is the bagged stuff just as good? If it gets you to eat more leafy greens, yes. Morgan McCloy/NPR hide caption

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Morgan McCloy/NPR

As Bagged Salad Kits Boom, Americans Eat More Greens

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