1. Spending trillions of dollars "just in case" instead of spending those finite resources on cancer and heart research, malaria eradication, health care, etc is not prudent. It's not exactly like we have money to burn.
Also, your bus example is not a good analogy. We know that brakes stop a bus. We also know that CO2 produced by man does not cause the ice ages. It may have a slight incremental effect on warming, or not. After all, since the seas have risen hundreds of feet in 12,000 years as the ice age cycle warms, a couple inches of additional rising of the seas are really just inconsequential perturbations. But the main cause of ice age cycles of warming and cooling is something else. I'm asking what is that cause and could it account for most if not all of the current rise in temperature? I'm really interested in the answer 2. but no one here seems to know.
1. Who told you that's where the money, as in public (?), would be going? It's a typical fib of substitution, where a prize that was never available is offered as decoy in an argument. The same "public health" lie was used, to great effect, in the lead-up to the Brexit vote.
2. You know perfectly well that if they did and told you, you still
couldn't buy it.
Couldn't, because it's mindset. Magically, all that shit we pump into the air doesn't affect anything because some of us don't like to imagine that it has to, that there is nowhere else for it to go, that it can't reasonably just hang there, doing nothing one way or the other. Preposterous to imagine anything else. Yeah, just as cigarettes, we were told in the forties and fifties, were making us all better singers if enjoying a more brief career. Stick in a star, and whether it's soap or cigarettes people buy the lie.
Obviously, then, better doing nothing than trying to do the bit that we can to prevent or at least limit within our abilities what may also be happening beyond our own causation.
Somehow, it all reminds me of that great Trumpian project: build a diversionary wall that will instantly stop US citizens craving drugs and consequently being responsible for thousands of Mexican dead every year through gang violence to supply that wonderful market. Colour it in the tones of immigration instead, immigration that does the jobs the legitimate Americans don't want to do, just as in Britain where some of the Poles, Romanians et al. find themselves doing the otherwise unfilled jobs nobody else wants. Jobs, in the end, that left undone would stop the country in its tracks. But hey, those jobs "we" don't want to do are obviously jobs that are stolen from us so we can no longer want not to do them, but can use them instead as ammunition with which to attack Johnny Foreigner.
You see how it works? Introduce non sequiturs, as the last paragraph above, and hope your opponent is of limited attention span.
"Yeah, things are pretty bad in the coal industry. I think the next democrat candidate should just be honest and tell the coal miners to get another job."
Now that's a wonderful idea: honesty in politics!
Sadly, it will never catch on: people don't want truth, people want comfort against reality. Politicians exist because the market exists. Snake oil can even be used for cooking, as proven by the tribes in the Amazon and in the Congo, and is guarateed to meet all international health standards and safeguards.