The early leader in environmental education movements is Rachel Carson, whose seminal book "Silent Spring" ignited environmental awareness. Published in 1962, the work revealed the dangers of pesticides, particularly DDT, and its detrimental impact on biodiversity and human health. Carson's advocacy for nature conservation and responsible environmental practices galvanized the modern environmental movement and led to significant legislative changes, such as the establishment of the Environmental Protection Agency. Her legacy continues to inspire environmental educators and activists globally.