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The process under investigation here was molten regolith electrolysis, which involves using electricity to split lunar minerals containing oxygen, in order to extract the oxygen directly.

Keith Reid, deputy chief medical officer for Wales, said the rules, which also cover those having acupuncture, electrolysis, piercing, and semi-permanent makeup procedures, would give people an "extra level of assurance around safety".

This reaction occurs in many industrially important reactions, for example in the electrolysis of water to produce hydrogen.

The company, based at Port Kembla, an industrial hub south of Sydney, is using a familiar process known as electrolysis, which involves passing electricity through water to split it into hydrogen and oxygen.

Green hydrogen employs a completely different production method, called electrolysis.