Like natural gas, hydrogen can be used to heat buildings and power vehicles. Unlike natural gas or petrol, when hydrogen is burned there are no CO2 emissions. The only by-products are water vapour and heat.
Hydrogen is the most abundant element in the universe, not freely available as a gas on Earth but bound into many common substances including water and fossil fuels. Renewable hydrogen is produced by splitting water molecules into hydrogen and oxygen through a process called electrolysis, powered by solar, wind or hydro- electricity. Australia has the abundant land area and renewable energy resources required to derive hydrogen by electrolysis at industrial scale.