We hear about pesticides a lot, but studies find that they really do harm the body over time. In fact, many scientists think that pesticides account for the current soaring cancer rates among children. While this list of foods isn't necessarily "organic" or "eco-friendly" (because they may still be grown on farms that use pesticides) you can buy them without fearing pesticide-overload. Why? They either grow above the soil, or have such a thick outer layer (like a banana peel) that the pesticides don't harm the part you're going to eat: Avocados, corn, onions, sweet potatoes, cauliflower, Brussels sprouts, grapes, bananas, plums, green onions, watermelon and broccoli.