run a car on water and save the planet

We are running our cars on fuels like petrol and diesel today. But we need to wonder how long would it last. The resources are limited and bound to get exhausted. So the need of the hour suggests we must start using water to run our cars. This is because the water cycle naturally recycles water every year. We can easily get water through rainfall which is a continuous source of water. And our future generations can abundantly use them. We can therefore easily contribute in saving fuels like petrol and diesel, which are depleting on a very fast rate.

If you want, you can run your car on water with a very low investment.