Earlier quoted context omitted.
We're not going to be able to escape climate change hell on earth by going to mars. You're not transferring 8 billion people to mars this century. The extremely optimistic scenario is that a small group of select rich people and explorers will be able to go to mars and live there self-sufficiently this century, but "we", as in 99.99% of humans, will have to deal with conditions on earth as they are.
You need a huge group of people to even vaguely approach self sufficiency, or multiple generational advances in manufacturing. For example, if you are importing microchips, you are not self sufficient.
The extremely, wildly, super-optimistic, not gonna happen style scenario is that a few thousand people live there self-sufficiently; and my point is that, however unlikely such a scenario is, even that is nowhere close to enough, because the vast, vast majority of people would still have to deal with climate change. Moving to mars is not, and has never been, "a solution" on foreseeable time horizons.