Back in high school I placed in some essay competition and got $50 by writing about alternative fuels in cars and what plans for efficiency looked like at the time. It was library research then, and I recall covering things like flywheels and, uh… I forget what else. Hydrogen maybe? I’m a bit surprised now that anyone on a judging panel cared in 1995, when gas was cheap and cars were getting bigger. At any rate, I read this today in Ars Technica, and it’s worth checking out for a look at the state of the art today.