The Dirty Dozen and Clean 15 are annual lists released by the Environmental Working Group (EWG) that rank fruits and vegetables based on their pesticide contamination.
The Dirty Dozen are the 12 items with the highest amount of pesticide residues.
The Clean 15 are the 15 items with the lowest amount of pesticide residues.
Keeping this list around helps you decide when it is important to make the choice to buy organic (Dirty Dozen) and when it is ok to buy conventional to save money (Clean 15).
Print the list and put it on your fridge until you get to know them well. Remember to check the latest version each year as the newest information comes out.