Rachel Carson, one of the most world famous American Ecologist was among the first one who find out about the Danger in Using Pesticides.
German explorer Alexander von Humboldt. Humboldt is often considered a father of ecology. He was the first to take on the study of the relationship between organisms and their environment.
Not only that, she wrote several books about many environmental concerns that started people's general Awareness in Environmental problems, such as: The silent spring and The sea around us