I can't wait for that to be a problem :) Most carbon capture schemes like this tend to have some sort of concentration step, often using amine sorbents or othe

I can't wait for that to be a problem :) Most carbon capture schemes like this tend to have some sort of concentration step, often using amine sorbents or other chemical equivalents. The atmospheric concentration doesn't tend to be the bottleneck here, from what I can tell. There is the question of "what happens when we're at pre-industrial carbon levels", which yeah, means that we'll have to stop getting our carbon straight from the atmosphere :)