Drowning isn't the problem, lack of oxygen is. If you understood the aerobic stratification process which has occurred with each of the previous major disturbances in the atmospheric chemistry, you wouldn't be so quick to dismiss the consequences of our actions today
Truly, one doesn't need to understand that process or even know it exists. Merely knowing one is out of one's depth trying to refute the rigorously obtained findings and extrapolations of people whose job it is to examine that stuff and share with the world the results of their tests and analysis should be enough to stop anyone with half a brain from quickly dismissing their admonishments and advice.
On the matter of global warming, it's potential effects, and what we can do about it, we have 97% of the folks on the planet who've studied the matter independently arriving at the same overall conclusions. What that tells me is that 9.7 out of 10 individuals who are (1) supremely qualified to examine something pertaining to global warming and (2) who elect to examine something related to global warming or elect to examine something not obviously related to global warming find out that the warming is the cause of "whatever they were examining", each and every time keep coming up with the same results, outcomes, observations, etc.
That doesn't occur by coincidence, contrivance, covetousness or conspiracy. Those four motivators may at times be in play, and even working to a good extent, but not to 97% extent. Moreover, were the 97% indeed wrong, or the surety of their conclusions truly questionable, I'd expect the 3% of equally credible experts to perform their own equally objective research that shows something contrary to the the 97%'s findings. But, from what I've seen, they don't. The most I've seen in scholarly papers is the 3% tossing stones at "this or that" minor point, but nothing that militates for a sea change in conclusion.
More importantly in my mind than whether all of the 97% are 100% right, 80% right, or even 30% right with regard to their conclusions and predictions. The critical decision factor is my mind is that I DON'T DON'T HAVE ANOTHER PLANET TO WHICH I CAN IMMIGRATE WHEN THIS ONE BECOMES UNINHABITABLE FOR ME OR MY DESCENDENTS! Last time I looked, neither does anyone else. Moreover, there isn't so much as a viable planet that's even been identified, regardless of whether anyone has a way to get there. Now to me, that means that if there's a reasonable,
i.e., a chance of happening that is better than my odds of rolling dice and getting "snake eyes," I think it's worth taking the "better safe than sorry" option. If I had another planet, or even a moon, to move to, I might be less risk averse. But I don't, nobody else does either and that's something about which 100% of us can be 100% certain.
P.S./Edit:
I don't really care if humanity is the cause of global warming. The planet is warming.
- What I want to know is what can we do to try to slow or abate the warming?
- Is there a "point of no return" as goes by when we must achieve XYZ?
Why conservatives oppose trying to do "whatever" to stem global warming is beyond me. It seems to me that doing something about global warming is tailor made to the U.S.' comparative advantage in intellectual capital and is a fine opportunity to create an entirely new industry segment that in turn creates a new employment sector in which the U.S. and its workers lead the world.