I've heard about this book for years. I'm glad I finally took the time to read it. There's a lot of fascinating speculation about how the world might change if we were to leave. It really drives home just how much we've scarred our home planet. Weisman's writing is at times a bit long-winded and he probably would have benefitted from tighter editing. Still, even 15 years after it was initially published, this book is well worth reading.