Hydrogen is an energy-rich gas, which releases no carbon emissions when burned. It can be used in most equipment where fossil fuels such as natural gas (methane) or LPG (liquefied petroleum gas) are currently used. In your home, that might mean a gas boiler, heater, cooker or all three.
It can also power combustion-engine vehicles which might otherwise run on petrol. And it can generate enough heat for heavy industry processes such as steelmaking, which is overwhelmingly done by burning coal at present.
