Agrochemical spraying in Argentina has increased ninefold, from 9 million gallons in 1990 to 84 million gallons today. Yet the South American nation has a hodgepodge of widely ignored regulations that leave people dangerously exposed, and chemicals contaminate homes, classrooms, and drinking water. Doctors and scientists are warning that uncontrolled spraying could be causing health problems across the nation. ( 17 photos )

Soybeans ready for harvest are bathed in afternoon light near Rawson, in Buenos Aires province, Argentina on April 16. American biotechnology has turned Argentina into the world's third-largest soybean producer, but the chemicals powering the boom aren't confined to soy, cotton, and corn fields. They routinely contaminate homes and classrooms and drinking water. A growing chorus of doctors and scientists is warning that their uncontrolled use could be responsible for the increasing number of health problems turning up in hospitals across the South American nation. (Natacha Pisarenko/Associated Press)