I always remember at one time, I had a dinner in one restaurant with my family, and the vegetable I ate taste bitter. And then my dad said it cannot be eaten, because it content lots of chemical pesticide that they often used to kill insect. My dad favorite past time is gardening, because his only option to get fresh veggies is by plant it himself, even in local farmer market it was hardly to find organic veggies and fruits. So by that moment, I watched what I eat, if not in dad's house, I will go for option for organic veggies.
My aunt once had a small surgery for her breast because she had tumor on it ( is that what they call?? I don't know the medical term). She is kinda person that lived in big city, prefer to go to TESCO or CARREFOUR cause the best deal they had on veggies and fruits, and she is a monster in eating eggs. Imagine she can finish up a carton of eggs that contain 36 eggs/ carton in a week. And after she's going through all those surgery, the doctor had advise her to avoid taking lots of process eggs ( the organic one is the best), always go for the organic foods because they aren't likely to contain much chemical in it. I found this article on what veggies you should go for organic on Reader's Digest because those foods often contain lot more pesticide that others that are offered in market
The top 3 culprits:
1. Celery clocking in with 64 pesticides.
2. Peaches with as many as 62 pesticides.
3.Strawberries, especially out of season, with up to 59 pesticides
sources: Reader's Digest by Liz Kennedy