Only about 50% of the world's energy and products can be supplied by electricity connected to renewable energy or a battery.The rest requires another source that can supply energy anywhere and make things like steel and fertilizers.That source is green hydrogen,made from splitting water into hydrogen and oxygen,a process called electrolysis,using only renewable energy.This results in almost zero emissions of carbon dioxide.It is feasible to supply the missing balance of the world's energy through green hydrogen,and it must be in place well before 2050.The question is not whether hydrogen is the fuel of the future.It is about how soon we can make it happen.
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