I know each alternative fuel comes with a price (as does everything). The extracting of hydrogen is supposedly not environmentally friendly, this being one of the prices of its implementation. I am not an expert on the subject though. Does anyone know what the cleanest alternative fuel available or that has been found is ? I also am wondering what some of the pros and cons of some of the others are. I suppose cleanest could mean one that is the most environmentally and economically friendly source available so far.
