I wonder if it's really required to have 1g gravity in order to avoid this. It's much easier to artificially create, say 1/6g (moon) gravity by rotation than 1g, since rotational speed required is quite a bit slower.
It will help us getting to a place where we don't pump up stuff from below ground which ultimately ends up as CO2 in the atmosphere. If we stopped pumping oil out of the ground, we would have left other CO2 sources which are from cyclical sources, and which we can deal with other ways.