Originally Posted by alf6300

Make a small model of the earth and put it under the sun. It gets considerably hotter if you fill the atmosphere of your small model with co2.

That's essentially what climatologists do, and extrapolate the data to see how much co2 will make the global temperature hotter, and when. A very falsifiable prediction, indeed.

Sadly, the model and predictions have not been falsified yet: quite the contrary. So I would prefer not to bet my ass and my kids ass that they are wrong, but that's indeed what we are doing.