And buying organic, you're not safe from pesticides! In fact there are over 20 chemicals approved for use by the US Organics Standards. For example, Rotenone, which is an organic pesticide, is highly toxic, a known carcinogens and has been linked to Parkinson's Disease.
Even worse the National Center for Food and Agricultural Policy showed that Organic Farms use from 2 to 21 times MORE pesticide per acre than conventional non-organic farms.
Organic pesticides are still pesticides - they kill bugs! It's just that they're derived from natural sources instead of man-made. However, even though they are natural doesn't mean they are any less harmful to humans then their man-made versions.
Just to illustrate the point, arsenic is one of the most dangerous poisons known to humans, but it's also naturally occurring and not man-made. Just because something isn't man-made doesn't make it any less dangerous. Fortunately for us, arsenic isn't used as a pesticide.