Although hydrogen is almost everywhere in the universe, it does not exist freely or independently like a coal seam or oil field. You can’t find a hydrogen reservoir. Hydrogen must come from other sources of energy, such as water. This means hydrogen is an energy carrier. As an energy carrier, hydrogen can also be transported worldwide where needed. Liquid hydrogen, which forms at the ultra-low temperature of around -423 degrees Fahrenheit (-253 degrees Celsius), may ship anywhere. Hydrogen as gas can move around existing natural gas pipeline infrastructure, making it a portable store for power generation.