Vacuuming carbon from the atmosphere may be most realistic solution to climate change
If someone ACTUALLY wanted to remove CO2 from the air you'd build a facility at the South Pole, where the air temps are such that chilling air another 20-30 degrees causes the Co2 to drop out as solid.
An idea I read about some time back was to develop nano-technology to the point where it could not only 'grab' CO2 out of the atmosphere, but also structurally arrange it into infrastructure. So, for example, 'growing' a road made out of diamond (potentially literally) and thus with quite good wear characteristics.
One way or another, re-sequestering the carbon that has been liberated through human activity does seem to me to be an idea worth exploring, and particularly if that carbon is deemed with high probability to be causing a lot of problems.
Politically, my main concern about this is that the whole issue will be used as an excuse to justify continued military and political control over fossil fuel extraction and transfer corridors. E.g., we (the U.S. and our minions) 'must' continue to occupy Afghanistan because we are saving the world by controlling the pipelines which pass through the region.
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As for global climate disruption, for 30 years now it has seemed to me quite plausible that liberating millions of years worth of sequestered carbon in the span of a few centuries would be unlikely NOT to have some effects.
Another theory that seem sound is that entities who have capital at risk if there are changes to how various industrial efforts are undertaken are willing, able, and demonstrably engaged in propaganda efforts to minimize those risks. Evidence of this abounds in my opinion. The flip side is that there are people who are fundamentally against almost industrial development, and I've no doubt that they would seek to influence public sentiment around the issue to further their own goals as well.