The “social cost of carbon” is a reference to CO2. The social cost is a fabrication
Climatologist Dr. Pat Michaels writes:
In his introductory remarks, Congressman Lowenthal (D-NY) went on the usual these-witnesses-are-climate-deniers rant. As I was the next speaker, I re-wrote my oral testimony to point out, in three spots, that people who did not recognize the low-sensitivity papers, or the huge disparity between the midtropospheric observed and modeled data, or the low sensitivity in the multiauthored Otto study (15 of the authors were lead authors in the last IPCC repor)t, were in fact “science deniers”.
Judging from his reaction at the end of the hearing, it really got to him.