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What is the criteria for success? If they extract CO2, don't they need a plan for where to put it? If their scheme involves reducing CO2 to carbon, where do they get the energy?
Solar power+CO2 into liquid fuel sounds good. I'm just noting that reducing CO2->C+O2 takes the same energy as you get from combusting C+O2->CO2. So if you're talking about reducing the atmospheric CO2 that all engines and power plants have made for the last 100 years...
That's if you want to reverse all added CO2, which we wouldn't have to do for a while, if that's a meaningful goal. But the ability to make all gasoline, jet fuel, etc carbon neutral in the future is pretty big.
Definitely good for jets since we still don't have better alternatives. For cars I wish an even faster phasing out of IC engines, since they also emit other air pollutants (brake discs, NO2, etc).
It may be that green fuel and IC engines will be cheaper, longer range, and better for the environment than big lithium batteries.
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