Hydrogen is an abundant element. It does not occur naturally as a gas it is always combined with other elements. Water, for example, is a combination of hydrogen and oxygen (H2O). Hydrogen must be separated to make it into an energy carrier.
Hydrogen offers a way to deliver low carbon energy because when it is burned it doesn’t produce CO2, just water and heat. This has led many experts to see hydrogen as an adaptable alternative to fossil fuels.
Hydrogen can be made from a wide range of primary energy sources, including renewable energy such as wind.