"The World Health Organization estimates that there are 3 million cases of pesticide poisoning each year and up to 220,000 deaths, primarily in developing countries."
http://www.toxipedia.org/display/toxipedia/Effects+o...

"This meta-analysis supports an association between parental occupational exposure to pesticides and brain tumors in children and young adults, and adds to the evidence leading to the recommendation of minimizing (parental) occupational exposure to pesticides."
http://www.ncbi.nlm.nih.gov/pubmed/23567326