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Comment by wang_li | Hacker News Reader

I mean capture of CO2 from the air and conversion into a fuel that can be used. Something along the lines of algal farms that soak up sunlight and CO2 from the air and excrete alcohol. Combining solar and the CO2 that has already been released into a liquid fuel suitable for a variety of uses. We could cease raw material extraction entirely.

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Seems inefficient. Fossil Fuels work today because you just suck them out of the ground and ta-da! free energy when you burn it. If you have to pump enormous energy into harvesting the carbon so you can burn it and re-harvest it, why not just put that energy straight into the car and cut out the carbon entirely?

The battery is the thing that makes an electric car "expensive" today, but it's following a consistent downward price curve. In ~5-7 years, it will cost more to make an ICE car than an EV car, and then ICE dies. Simple as that.

Not if the EV can't go more than 200 miles and takes half a day to refuel.

Except they already go >300 miles and take <75 mins to charge to 90%...

> If you have to pump enormous energy into harvesting the carbon so you can burn it and re-harvest it, why not just put that energy straight into the car and cut out the carbon entirely?

Energy density. Jet fuel has about 25x the energy per kg as the best lithium batteries. Perhaps batteries will be able to match carbon fuels some day, but it's a long way off.

Ah I see, I thought you were just talking about carbon sequestration

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