[gyanreyer]

If the "unburning" could be done using zero-emission renewable energy it seems like that would the best or only way to effectively remove excess CO2. I'm skeptical that there will ever be a true magic bullet carbon capture technology like that though.

[rhelz]

We have the tech today. Its just 1) too expensive, and 2) thermodynamics says it always will take more energy to suck the C02 out than we got from putting it there, so what's the point?