Claim: "You don't have to be as smart as a fifth-grader to know what causes the climate is the sun. The sun. I have people tell me, 'Carbon dioxide warms the Earth.' No, it doesn't. The sun warms the Earth."
Fact-check: Don Zimmerman says every child learns the sun warms the Earth; carbon dioxide does not
Verdict: barely-true
Organisation: PolitiFact
Author: Asher Price
Date published: 2015-06-05T00:00:00