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I went and visited my town’s waste water treatment facility the same week I was reading this book. It’s a book that looks into the various things you can do with human waste. How we treat it, how it can treat us, various different ways you can try to live more sustainably with the things we excrete (mostly poop). This book is chatty, upbeat, and interesting without being too pie in the sky about what we need to be doing. Nelson is a very capable science writer with a doctorate in microbiology and a decent sense of humor which is a must for a book like this.