Science is advancing so rapidly, none of this matters. You should not ameliorate the global warming because if you overdo it, you will induce an ice age, which can start in as little as a year or two (all you need is a summer where the snow doesn't quite melt) and then you will kill billions in less than a year.
We can less predict the tech in 100 years than the people in 1900 could predict today's. We are the people in 1900 trying to fix the problem using their info and their tech. Decimating their own industry would just have slowed getting to today's tech level, benefiting nobody and killing probably a few hundred million due to delayed innovation.
So, even amelioration can be bad, and the downside is magnitudes worse than warming.