Here is the answer that counts most I'm thinking:
Rex Tillerson, United States. Secretary of State:
"I came to the conclusion a few years ago the risk of climate change does exist, and that the consequences could be serious enough that action should be taken,” Tillerson said during his confirmation hearing.
Read more: http://dailycaller.com/2017/01/11/tillerson-the-risk-of-climate-change-does-exist/#ixzz4WKlQWJlC