don't want to swing this off topic but in regards to where does the h2 come from? Anybody that gets farm show magazine may recall a couple issues ago about a guy in Alberta that designed a hydrogen generator that produces on an as needed basis. currently being tested on diesel highway tractors. I think this is maybe the ultimate answer as every household could have a diesel hydro generator running 24 hrs on water, your vehicles and tractors could operate on water. Could you get anything cleaner or more efficient than that?