They are called the dirty dozen and clean 15.Lists that the environmental working group puts together to help consumers know when they should buy organic and when it's not necessary. Dr. Andrew Weil founder of the Arizona Center for Integrative Medicine says Fruits and vegetables on "The Dirty Dozen" list, when conventionally grown, had at least 47 different chemicals.....The clean 15 bore little to no traces of those pesticides.
"The Dirty Dozen"
sweet bell peppers
spinach, kale and collard greens
"The Clean 15"