The hydrogen fuel cell will be an important component of the emerging clean energy economy. The fuel cell can power electric cars as well as provide electricity to homes and offices. Creating hydrogen in a renewable way is one of the challenges that need to be overcome for the breakthrough of the fuel cell. Now a California start-up has announced it has built a hydrogen generator that’s inexpensive to manufacture and produces on-demand affordable hydrogen. “This technology shall reduce the costs of electricity and fuel transport at least by 50 percent,” the company said in a statement. The generator uses tap water, aluminum and a small amount of electricity can come from a small solar panel or a mini wind turbine.