Car engines could be a lot better than they currently are. This is not some oil industry conspiracy, but a simple reflection that the design is pretty creaky. It has been around a long while. And, of course, cars are currently about as green as something that isn't very green at all. It's remarkable that the internal combustion engine, the heart of travel industry still, is so impressively inefficient. Around 25% of the energy generated from the fuel is actually used to move the car. Eventually I have no doubt we'll all be driving electric cars - we're just waiting for a shift in battery technology that seems pretty close on the horizon. (If I had the money, I'd be driving a Tesla right now.) But there are bound to be decades of gradual transition when we still need to make use of fossil fuels. I've had pointed out this remarkable project to produce an engine that should increase efficiency of an internal combustion engine more than twofold. It's a t...