I think the conservatives don’t disagree that climate change is real, they disagree that humans are responsible. To them it’s things like El Niño or solar activity.
And they're wrong according to virtually every person who actually studies the climate for a living, so they might as well pretend it's made up.
And it's stupid anyway. You might be able to deny human-caused climate change, but you can't deny smog and pollution. Greener energy sources mean less smog and pollution. Why isn't that a good thing to them?
It's a fundamental lack of understanding of math and science.
There's a video going around conservative circles talking about how CO2 only makes up .04 percent of the atmosphere, and therefore even if it were doubled it would be less than 1/1000th of the atmosphere, so it's not worth worrying about.
I tried to explain to my father that that's exactly why we're able to have such an impact. They don't understand that we're able to make a much larger relative impact on CO2 versus Nitrogen and Oxygen and therefore a larger impact on global temperatures.