Final answer:
Rachel Carson's work, especially 'Silent Spring,' focused on clean water and preserving land for national parks, influencing environmental legislation and awareness.
Explanation:
Rachel Carson, through her seminal work Silent Spring, had the greatest impact on clean water and preserving land for national parks. Her research and advocacy led to increased awareness of environmental issues and paved the way for significant environmental legislation, such as the creation of the Environmental Protection Agency and the passage of laws to protect air, water, and natural areas.
Learn more about Rachel Carson's environmental impact here:
https://brainly.com/question/32342616
