What was the purpose of author in "Silent Spring" and Save the Redwoods"

Paragraph 4 of "Save the redwoods"

Explanation:

RIGHT ON EDGE 2020-21

Rachel Carson's "Silent Spring" was written to show the way that pesticides hurt the environment. Carson shows how the toxins in pesticides can travel through the food chain to kill animals who don't linger near them such as birds, including eagles. She explains that toxins can cause cancer in humans by hanging out in fat cells where they break down and affect other cells in the body. Carson closes the book by offering natural alternatives.