I have spent my career publishing in environmental and urban economics. You can look up my Google Scholar page to see that many of my papers are well cited.
Over the years, I have written out a distinctive undergraduate environmental economics textbook that I use in my classes. You can buy the Amazon e-book here for $8.
To encourage Professors to adopt parts of this book in their courses, I provide you with my 350 of my lecture slides for free and many practice exam problems.
Please email me if you have any comments for how to improve these materials. I was impressed with Tim Taylor's efforts to provide open source economics content and this is my effort to match his effort
I make my Amazon E-book available for free twice each year for a week. How much consumer surplus does this generate? I don't think that any of the other environmental economics books are good substitutes for my book.