The 2017 Toronto Auto Show brought the unveiling of a hydrogen fueled Toyota concept car that has zero emissions. Lightweight and powered by an electric motor, this car produces nothing but water. The added bonus is that the car can not only produce energy for propulsion, it can also produce power for a household and enough to charge other electric vehicles. The biggest drawback is that scientists have not yet discovered a way to extract and store hydrogen without producing more emissions than they save. If they can manage to solve this puzzle, hydrogen is one of the most readily available renewable energy carriers on earth.