As if we needed any more evidence that pesticides are bad for human health, three independent scientific papers have provided some of the strongest evidence yet of the link between exposure to organophosphate (OP) pesticides and lower IQ levels among children. Published in the latest Environmental Health Perspectives journal, the results suggest that prenatal exposure to OPs can have a lasting and damaging effect on our children. Researchers from the University of California, Columbia University, and Mount Sinai School of Medicine all found that children exposed to higher levels of OP while in the womb were likely to have significantly lower intelligence scores by age seven than children who were not exposed.