> Once all the countries get to close to net zero carbon, the discussion will turn to net zero historic carbon. Once we start geo-engineering at the climates s

> Once all the countries get to close to net zero carbon, the discussion will turn to net zero historic carbon. Once we start geo-engineering at the climates scale, different countries are going to be targeting an ideal carbon concentration for their country, not trying to be historically neutral. I don't think historically neutral is going to be a positive thing for countries in or near the arctic circle. If we've gone far enough down the rabbit hole that currently cold parts of a country have warmed and become inhabited, it'd cause an exact reverse of the current problem of pushing people out of their homes because of warming/flooding.