From Mother Jones Magazine:

Some fruits’ and vegetables’ thick skins do protect the edible part from chemicals. But not all. The Environmental Working Group recently analyzed samples of 47 common produce items in the state that they’re usually eaten (i.e., avocados were peeled, apples washed with water, etc.) then ranked them according to the amount and variety of pesticides the researchers found. Good news for my guac addiction: As I suspected, peeled avocadoes contain a small amount of pesticides, ranking 46th on the list. But bananas come in at a surprisingly high 27, and cucumbers at 19. “It’s really hard to use your intuition to figure out what’s going to have high pesticide loads,” says EWG spokesperson Amy Rosenthal. “Skin is something to take into account, but it doesn’t always make a huge difference.”

More findings: Peaches, apples, and sweet bell peppers were the three most pesticide-laden crops tested, while frozen sweet corn, avocado, and onion were least contaminated. The EWG team estimates you can lower your pesticide intake by as much as 80 percent if you steer clear of the top 12.

In descending order, the EWG’s 12 most contaminated fruits and vegetables:

1. Peaches

2. Apples

3. Sweet bell peppers

4. Celery

5. Nectarines

6. Strawberries

7. Cherries

8. Kale

9. Lettuce

10. Grapes (imported)

11. Carrots

12. Pears

For the full list of all 47 fruits and veggies, go here.

Farron Cousins is the executive editor of The Trial Lawyer magazine and a contributing writer at DeSmogBlog.com. He is the co-host / guest host for Ring of Fire Radio. His writings have appeared on Alternet, Truthout, and The Huffington Post. Farron received his bachelor's degree in Political Science from the University of West Florida in 2005 and became a member of American MENSA in 2009. Follow him on Twitter @farronbalanced