The concept of using renewable energy sources for your automobile is old indeed and while major conventional headway is yet to be done, there are several ways available in the market that guide you into running a automobile with optimal efficiency on Hydrogen gas fuel cells. Interestingly, running a automobile on water would involve breaking H2O into its essential molecules, but Hydrogen gas system works on a complete different engineering science, which is used not successfully by many prototype machines as well as cars across the globe.