Battery electric vehicles are making headlines, but fuel cells are gaining momentum—with good reason. Hydrogen could play a vital role in the renewable-energy system and in future mobility.
At the COP21 meeting in Paris in 2015, 195 countries agreed to keep global warming below 2 degrees Celsius above preindustrial levels. To reach this target, the world will need to cut energy-related carbon dioxide (CO2) emissions by 60 percent by 2050—even as the population grows by more than two billion people.
