Could the answer to our transport needs have been right in front of our faces all this time?Conventional cars work by exploding fuel and air in a chamber to exert force on the pistons, but what if rather than using an explosion to provide that pressure on the piston, you just stored your ‘fuel’ at a constant high pressure. That’s the concept behind the air car, and it looks like a pretty promising technology. Like hydrogen the air is not actually the source of energy, it is the storage medium, but...
