Mixing carbon dioxide with water creates carbonic acid, which is the root cause for ocean acidification.
Even Chemistry 101 is lost on these fools.
Honestly, I think a lot of the mismatch between perception and reality is from the sheer immensity of the Earth and the perception that human activity is far too little to affect the world. The trail of exhaust from a Hummer just wafts into the clouds and disappears, never to be seen again. Of course, that isn't what actually happens. It affects things, if only minutely. Multiply it by every other Hummer, and that's a lot of carbon wafting around.
Plus, it still snows during the winter, so those climate change alarmists are surely blowing it out of their asses. Scientists in Europe predict it'll be warmer by 2 degrees. In the winter, that's the difference between 40°F and 42°F. Big whoop. Climate change isn't real but if it were real, it wouldn't even be a real problem.
And finally, the Ds say it's a problem and the Rs say that's balooney and the waters are muddied enough that it's just a he-said-she-said situation.
And around and around we go.