I already once mentioned that I was going to write a master’s thesis about economic valuation of ecosystems and the Yasuní rainforest of Ecuador. I submitted the thesis some months ago and wanted to make it available to anyone interested in the subject. It can be downloaded here: http://ubuntuone.com/6lkeCkyV4R9LLW9wx8VQLZ I make it available under under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License, so you are free to use it with the restriction of no changes and no commercial use.
[UPDATE: As UbuntuOne, where I had uploaded my thesis, has gone offline, the thesis is no longer available. In case you are interested in getting it, write a comment.]
[UPDATE2: The thesis can be downloaded from ResearchGate here.]
The Sceptical Economist 
Hi, I know this post is really old, but I’ve been following this topic for my environmental economics course, and I would love to read your paper.
I’m going to upload it somewhere during the day, but with the caveat that it’s just a master’s thesis and thus not to be trusted too strongly;-)
You’ll now find a link in the text above.