“This is … a U.N.-backed body that quite frankly is an advocacy group for controls on carbon emissions,” said Tom Harris, executive director of the Natural Resources Stewardship Project, a leading clearinghouse for challenges to the science behind global warming. …
“There're over 10,000 reports that come out in any year on climate change … and this group doesn't represent at all that many of the leading scientists in the field. Our own scientists have raised questions about the data they've seen from the IPCC.”
Tom Harris, executive director, the Natural Resources Stewardship Project
The above quote, from the  South Florida Sun-Sentinel , shows again the extremes that energy-industry funded public relations people will go to attack the Intergovernmental Panel on Climate Change.
Per a post here a couple of days ago, the Natural Resources Stewardship Project  is a public relations front for an energy industry lobby firm; Tom Harris admitted as much  to the Toronto Star less than a week ago. The Chair of the NRSP is a retired geographer who has never published anything on atmospheric science and who has consistently lied about his own academic credentials. 
Yet these people feel free to dismiss the IPCC as an advocacy group incapable of understanding climate science. In fact, if the Sun-Sentinel is quoting Harris correctly when he says that the IPCC “doesn't represent at all that many of the leading scientists in the field,” then Harris has reached a new low in saying things that vary, in stunning fashion, from anything that could resemble objective truth.