In our view, Daniel Greenberg's book review of 'The Climate Fix' by Roger Pielke Jr (Nature 467, 526–527; 2010) does a disservice to your readership by besmirching the integrity of the climate-research community.The relevance of Greenberg's minor interactions with the Marshall Institute to his review of my book is left for the reader to discern, but presumably it disqualifies him from something. If Mann et al. want to actually comment on my book, there are far more direct ways of doing so. I suspect that a critique of a review of my book is the closest that these activist scientists will get to actually engaging it.
Nature should have pointed out to its readers that Greenberg has served as a round-table speaker and written a report (see http://go.nature.com/otwvz2) for the Marshall Institute (see http://go.nature.com/4u9ttd).
In the letter, they also take issue with Greenberg's use of a quote from Steve Schneider. They fail to mention that my book presents the full quote as well as Schneider's response. For some odd reason Nature did not point out to its readers all of the organizations that Mann, Ehrlich and Rahmstorf have contributed to as speakers or report writers. That would just be silly, wouldn't it?