Launch HN: Prometheus (YC W19) – Remove CO2 from Air and Turn It into Gasoline
How could the math possibly work out on this? If a gallon of gas holds 33.70 kWh of energy, and you can get cheap electricity for $0.1/kWh, you're looking at $3.37/gallon if you have a magical process that converts with 100% efficiency.  Even if you hit your efficiency goal, which would be impressive, who is paying $7/gallon for gas?  Just buy an electric car.  This can only possibly be useful when all of the oil is gone and there is no other alternative, right?