Which author is incorrectly matched with their work regarding environmental topics?

The author and work that is incorrectly matched regarding environmental topics is Theodore Roosevelt with "The Nature of Things." In fact, "The Nature of Things" is not associated with Theodore Roosevelt, but rather with the poet Lucretius, who wrote in ancient Rome.

Theodore Roosevelt is well-known for his contributions to conservation and environmentalism, particularly through his establishment of national parks and his role in the conservation movement in the early 20th century. His own writings, such as "The Wilderness Hunter" and "A Book-Lover's Holidays in the Open," highlight his passion for nature and wildlife conservation. While Roosevelt was an influential figure in environmental advocacy, he did not write "The Nature of Things."

On the other hand, the other authors and their works presented in the question are accurately matched. Rachel Carson's "Silent Spring" is recognized for its groundbreaking exploration of the dangers of pesticides and has significantly impacted environmental policy. Al Gore's "An Inconvenient Truth" focuses on climate change awareness and has played a crucial role in educating the public about global warming. Henry David Thoreau's "Walden" is a reflection on simple living in natural surroundings and is considered a classic in American environmental literature.