Hydrogen is the most abundant element on earth. Generally, hydrogen is manufactured through steam reformation of natural gas.
Hydrogen is also manufactured from fossil fuels, which we burn quite a bit of them. Hydrogen can be used in many ways.
The most prominent use is to run fuel cells. Fuel cells are cells that produce electricity by using hydrogen as a catalyst. Through chemical processes, fuel cells create electricity.
Fuel cell generators are being used to run buildings. Fuel cells are being put into cars. Hydrogen cars are one of the ways that the world can wean itself from fossil fuels.
The future of hydrogen is great if we can find a cheap and clean way to extract hydrogen gas. Fuel cell technology is still growing rapidly.
If alternative energy sources can be used to create hydrogen reserves this would be an enormous development in clean energy.