Light and water - the dream team.

Clean energy.

The sun sends as much energy to the earth in an hour as mankind consumes in a year. This energy can be used to produce electrical power in solar power plants, for example. The electricity can then be used to break down water by electrolysis into hydrogen and oxygen. During this breakdown process, the energy gained is transferred to the hydrogen. Hydrogen is therefore merely an energy carrier and not an energy source like petrol is. Consequently, hydrogen is not actually consumed in the true sense of the word.