A non-profit research organization called the Environmental Working Group has released the seventh edition of its ‘Shopper’s Guide to Pesticides in Produce.’ More than 50 fruits and vegetables were tested for pesticides and then ranked. The worst offenders were put on a list called the “Dirty Dozen” and the cleanest conventional produce was placed on the “Clean 15” list.

For more information, check out the EWG’s website here.