Bruce Ames of the Children's Hospital Oakland Research Institute in California has put forward the contoversial theory that people's fear of supposed harmful chemicals lingering on produce could be causing some to avoid fruit and vegetables, especially those on low incomes who feel they can't afford to buy organic alternatives. Though there is a lack of information about the effects of certain chemicals so no one knows for sure exactly how pesticides affect human health at various levels. However any health risk posed by pesticides on produce...