> price CO2 emissions at the actual cost of sucking the thing back out if the atmosphere

This is the only relevant bit actually. The rest will follow from there. And in principle, at least in Europe, we already have some mechanisms to do this. We'd "just" have to up the prices.

BUT of course with the right wing on the advance, and with them having identified basic physics (i.e. climate change) as a culture war terrain, this keeps being watered down... Oh well... This is why we can't have nice things... like a future...