Since much of the terminology used in food advertising is not regulated, manufacturers are able to make very misleading claims. To understand better some of the definitions and limitations to the truth about these claims, see this article:
While organic food is defined with a little more integrity, it is not cut and dried. Also, organic is more expensive, so save your dollars for when it really counts. Eating your fruits and vegetables is important to your health – and usually overshadows the risks posed by pesticides. For the most part, fruits and vegetables with a thick skin or rind that will be peeled can be safely consumed. In any case, always wash the surface before breaking the skin or you risk getting bacteria from the outside on the part you will consume.
Each year, a list of the cleanest and dirtiest (referring to pesticides) is published. Here is a link to the recent list: