Rachel Carson (1907–1964)
Rachel Carson was an American marine biologist and conservationist whose book Silent Spring is credited with launching the modern environmental movement. Her research and writing raised awareness about the dangers of pesticide use, particularly DDT.
Famous works:

Silent Spring (1962) - A groundbreaking book that exposed the harmful effects of pesticides on the environment, leading to changes in environmental policy.
The Sea Around Us (1951) - A best-selling book about oceanography that won the National Book Award for Nonfiction.