Erosion and Sediment Control Technology Standards Book

This book had the potential to be interesting if it didn't expound on ideas that you've already put together with common sense. The paragraph (or two or three) that I remember the most explained how selective harvesting (of trees) lessens the total biodiversity (x) of a habitat. You mean x-1 is indeed less than x? Shocking. . .
This book did, on the other hand, did have good chapters on human views of nature , conservation and ethics. A class could have good, thoughtful discussions based on some of those ideas.