  urlLink ABCNEWS.com : Is Spraying For West Nile Pointless? :""The chemicals have not been adequately tested for their human health effects," cautioned Dr. Sheldon Krimsky, a pesticide-risk expert at Tufts University. "There is a lot of circumstantial evidence that they cause cancer in animal studies, that they are hormone disruptors.
Remember, these are neurotoxins," Krimsy said, adding that most studies done on the effects of spraying focused on agricultural spraying — not spraying in populated areas. "We simply don't know what effects it's going to have, the indiscriminate spraying on human populations," he added.... "Since adult mosquitoes only live for about two weeks at the most — whether they're sprayed or not — the most effective way to limit mosquitoes is to keep them from breeding. And that means emptying out pools of water where they lay their eggs... " 
