Agreed it is disturbing that prospective Director of CIA would deny concern over one of the major threats to US and World Security.
Natasha, it is not accurate to say “ climate scientists are 97 percent certain that climate change is both real and a result of human activity”. As your link makes clear, almost all US and International scientific associations agree that climate change is real and the result of human activity. According to reference 1 (J Cook et al.) on that page, over 97% of published papers expressing a position on anthropogenic global warming endorse that consensus. That is quite different from saying climate scientists are 97% certain. Given the level of controversy and challenges in explaining the meaning of “scientific consensus”, it is helpful to be precise in these expressions of uncertainty.