Adam Kinzinger on Climate Hoax: Unclear

The claim: Human-caused climate change is a hoax.

2010-07-01: “I pledge to the taxpayers of my state, and to the American people, that I will oppose any legislation relating to climate change that includes a net increase in government revenue.” source
2019-09-18: “while some may say that the United States needs to be the leader of combating climate change, I would say that we already are.” source