Fuel of the future not looking so good
Hydrogen, a fuel source, can be manufactured using energy from fossil fuels or renewable energy.
Green hydrogen, made from renewable energy, can play an important role in hard-to-abate industries such as ammonia and steel production.
Hydrogen produced using fossil fuel is called blue hydrogen by industry and dirty hydrogen by experts. According to the International Energy Agency (IEA), natural gas is currently the primary source of hydrogen production, accounting for around three-quarters of the annual global dedicated hydrogen production of around 70 million tonnes.
This accounts for about 6% of global natural gas use. Gas is followed by coal, due to its dominant role in China, and a small fraction is produced from the use of oil and electricity.
According to Australian National University (ANU) researchers, dirty hydrogen is more polluting than simply using fossil fuels directly for energy.
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