During an interview Saturday with CNN’s Carole Costello, Bill Nye perfectly summed up what is wrong with the thinking of climate change deniers.

Mr. Nye said:

Suppose you had somebody running for congressional office in your district who insisted there was no connection between cigarette smoking and cancer. Would you vote for that person? You might, but if this person were adamant — ‘No, the scientists who studied cigarette smoking, they don’t know what…’ — if they were adamant, would you vote for them? And so, I just want everybody to keep this in mind: that it’s very reasonable that the floods in Texas, the strengthening storms, especially – the president was in Florida – these things are a result of human activity making things worse. It’s very bad.

Watch the full interview below.