It can be done. It takes energy. The same energy we got by burning the fossil fuels in the first place, plus more to account for inefficiencies. A lot more, since internal combustion engines are very inefficient.
If we had a sufficient energy source we could reduce CO2, but then we wouldn’t need hydrocarbon fuels in the first place.
It’s much more efficient to use new, green energy sources as a replacement for fossil fuel, than burn dirty carbon and try to re-capture the CO2 out of the air.
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