Birds across the United States are disappearing after towns are sprayed with pesticides. Dutch elm disease, a fungal disease brought to the U.S. from Europe, has invaded many cities in New England causing a need for abundant DDT spraying. The spraying of the Elm trees poisoned earthworms, which in turn lead to a drastic decrease in the number of robins that eat them. The DDT does not directly kill the robins, but it makes them sterile meaning they will be the last generation of robins. Many other species of birds die when trees are sprayed with insecticides because insects are their primary source of food. A more effective and cheaper method of eradicating Dutch elm disease is sanitation- clearing out diseased trees when they die so that they