I don't think it's a matter of discrediting an entire field. Climate change research is needed whether you believe man is the causation or not. We have to be prepared either way. It does bring into question credibility, objectivity, and ethics. The question is more knowing the kind of people involved and is the report trustworthy. I'm far more concerned that each and every country represented in the study seems to have conveniently cleared their researchers but each also seemed to bring up serious issues with ethics. It's like saying, "Sure this guy lies about a lot of things but I see no evidence he lied about this." Of course, my contention is getting the U.N. involved in any study is a waste of time anyway. They are by nature corrupt and I would always wonder, and do, how much it had to do with money.