Fruits and veggies with an edible skin or no skin at all are the most contaminated. The worst, or "Dirty Dozen," according to the Environmental Working Group, are apples, celery, strawberries, peaches, spinach, nectarines, grapes, bell peppers, potatoes, blueberries, lettuce, and kale/collard greens. When available, buy these organic.
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The 2014 Adventure Issue
From Iceland's Highway 1 to Utah's Canyonlands, an epic itinerary for modern explorers.
Plus: Building a Bigger Action Hero
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Duke Lacrosse and the Fog of Scandal
How Thailand's Most Notorious Prison Became a Fight Club
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