In defense of the Nature Conservancy, you should go to that link of corporations they work with and click on the links and see HOW they are working with those companies... many times the work that's being done is good and necessary and is often motivated by a desire for a change in culture in the company, a need for mitigating damage that company is doing elsewhere or plain old guilt. I'm not saying that these companies are doing the right thing for the right reasons, just that TNC would be foolish to turn down millions of dollars that can be used to buy, protect and manage sensitive natural areas. Remember that TNC is a conservation group - not an advocacy organization. Often, TNC functions as an intermediary between corporations and governmental regulators, bringing scientific resources and policy recommendations to complicated scenarios. The Nature Conservancy does good work in a ethically complicated arena - we need them.