Of course it is a story about how humanity is changing the environment. Typically these stories end focused on dire warnings, and I worried that Powers wasn't going to bring any further message than that - but instead he pulls a rabbit out of his hat, and executes a marvelous turn that had me in tears. More and more I have come to realize that viewing humans as something outside of nature does more harm than good. Highways are as much a part of humans as anthills are a part of ants. Of course humans are having a tremendous effect on the planet, as we have found better and faster ways to communicate. Modern man is a meteor that has struck the planet, and things are changing - they have to. We do indeed need help from all quarters - and this book helped me to understand where that help will come from. Also, I learned a lot about trees.