Dr. David Carpenter discusses Neonicotinoids, a group of widely used insecticides. They are absorbed by plants and can be present in pollen and nectar, making them toxic to bees. Research published clearly shows how neonicotinoids are killing bees or changing their behaviors.

David O. Carpenter is a public health physician who received his MD degree from Harvard Medical School. Dr. Carpenter's research is focused on study of environmental causes of human disease, especially the chronic diseases of older age such as cardiovascular disease, hypertension, diabetes, arthritis, thyroid disease, and neurodegenerative diseases.  He has studied rates of hospitalization for these and other diseases in relation to living near to hazardous waste sites, fossil fuel power plants, and other areas of contamination in New York. He has used results of these ecological studies to study specific populations highly exposed to polychlorinated biphenyls (PCBs) and persistent pesticides in Native American and Alaskan Native communities and residents of Anniston, Alabama - sites of the Monsanto plant that made PCBs. These studies have confirmed the association between PCBs exposure and rates of hypertension and diabetes that were suggested by the ecologic studies. He has ongoing collaborative studies on air pollution and health in several countries and studies health effects of electromagnetic field exposure. He has more than 450 peer-review publications and has edited six books.