The challenge 

Reducing the amount of CO2 that is emitted by us is essential for fighting climate change. Cars are one of the ways that CO2 is released into the atmosphere.

The solution

My idea is to create a hydrogen powered car which uses water of any clarity (rain, tap etc.) to create hydrogen. Hydrogen is a clean fuel because it burns with oxygen to make water vapor, and only water vapor. No carbon dioxide with its potential greenhouse warming effects is released. It is important to make the engine powerful so that is able to move the car. The converting mechanism should be efficient enough so that the car can use any type of water for the combustion. No water should go to waste.