https://arstechnica.com/science/2018/06/judge-orders-epa-to-disclose-any-science-backing-up-pruitts-climate-claims/

In March 2017, Scott Pruitt, the new administrator of Donald Trump’s Environmental Protection Agency, appeared on CNBC and said that carbon dioxide was not known to be a major factor in climate change. “I would not agree that it’s a primary contributor to the global warming that we see,” Pruitt said, adding, “there’s a tremendous disagreement about the degree of the impact” of “human activity on the climate.”