[Humdizzle]

its not like companies haven't thrown millions into researching this... no one has found a way to make a better/safer chemical reaction occur in the hot exhaust environment. the metals are just a catalyst. the fact that we need rare metal to accomplish it is just a costly coincidence.

running straight 100% ethanol would work (it only puts out co2, water, o2). but it gums up in low temps and is not as efficient as gasoline (you'd need to triple your tank size to get the same range).