Because of the improvement of life quality, people can afford buying more cars. More cars means more traffic jams, more jams means more pollution, and pollution itself creates a dangerous threat over the future of our planet.
Another problem that comes with using regular cars is that they use fossil fuels. It might seem that there are endless resorts for these and there are new oil mines opened every day, but the truth is that fossil fuels are slowly ending up and after that even the possibility of choosing which fuel to use, is eliminated.
So, now there has been invented a way of running a car on water. Or close enough to that. The fuel that actually is used, is hydrogen, and hydrogen is one part of the water molecule (the other one is oxygen). With the use of electricity, these two parts are separated and by combining them again, you will get water and energy. Simple, isn’t it!
Nowadays, the problem with a hydrogen based engines is that they produce less power than the old environmental hazard fossil fuel engines, this also means lower speeds and slower starts. A seemingly minor detail, that can ruin the idea of making this fuel popular.