Both authors want readers to protect human rights, to focus on saving trees. They intend to entertain readers with their essays and also to convince readers of their viewpoint.
Explanation:
In Silent Spring Rachel Carson makes up a fictional story about what life in the United States will be like if we don't save the environment, whereas in "Save the Redwoods", by John Muir, the author present facts and evidence to convince readers to rescue the Sequoia, which is a kind of tree.
