Pesticides on produce - buy organic to avoid these pesticides...some produce is more susceptible to absorbing pesticides. Produce with a covering you discard would have less residue but would still be within the product. The less toxins you intake, the less damage/stress to your system - some do not leave, hang around in your organs/tissues. These are the top 3 and as you can see, some toxins found are banned including DDT - oh, thought we had regulations? Oh but the health risk ones are ok'd - some regulations!
https://secure.ewg.org/images/EWG_Em...awPest_C01.jpg
https://secure.ewg.org/images/EWG_Em...Apples_C01.jpg
https://secure.ewg.org/images/EWG_Em...pinach_C01.jpg
https://www.ewg.org/foodnews/clean-f...1804FNRelease2