Every year an American non-profit organization called the Environmental Working group releases two lists that measure pesticide residue in fruits and vegetables. The Dirty Dozen has the most while the Clean 15 have the least. And for the third year in a row, strawberries have the dubious distinction of leading the dirty list with 22 pesticide residues detected. Here’s the rest of the produce on it in descending order: spinach, nectarines. apples, grapes, peaches, cherries, pears, tomatoes, celery, potatoes and sweet bell peppers. Part of the idea is to help consumers direct their organic food budget to these, fruits and vegetables with the most contamination. In fact, nearly 70% of conventionally grown — non-organic — produce samples had some residue. And experts agree it’s better to eat those than to skip fresh produce altogether.