Hydrogen is a rising star. Versatile and environmentally friendly, hydrogen produces no CO2 when combusted, only water and heat. It can be used to decarbonise electricity, heating, transport and industry. A clean energy vector, hydrogen is easily transported, stored and blended with current fuels.

Source:
https://www.weforum.org/agenda/2019/06/the-clean-energy-of-the-future-is-already-here/