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by danbruc 1015 days ago
[...] it’s unlikely (due to the thermodynamics of it) that removing a ton of CO2 will ever get to the point where it requires less energy than the energy produced from burning the fuel that created that ton of CO2.

This argument only works if you want to reverse the entire process, turn the carbon dioxide back into something similar to oil or gas. If you would burn pure hydrocarbons with pure oxygen perfectly, it would be as simple as condensing the water in order to get pure carbon dioxide.