If you want to help cut greenhouse gas emissions, you should probably skip the hydrogen fuel cell cars now coming to market and buy a much cheaper hybrid instead.

After decades of research and small-scale demonstrations, hydrogen cars are finally rolling into view. These vehicles use electric motors, but their electricity comes not from a battery but from hydrogen, processed in a chemical reaction that takes place inside a fuel cell.

za Fuel Cell Vehicles Aren’t Yet Greener than Hybrids | MIT Technology Review.