Soleron on 23 October 2012
The article is misleading. Energy is not generated from the air, it uses electricity we already have to make petrol from CO2+water. Then the car burns the petrol to make CO2+water again. No net CO2 is removed from the atmosphere and no energy is gained, it's just that petrol is a convenient high-density fuel for transport (electric cars have expensive and low-capacity batteries).
Finally this isn't revolutionary: http://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_process
