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by pfdietz 1076 days ago
A possible solution is to make the hydrogen by electrolysis of brine. This can make hydrogen and chlorine (and alkali) instead of hydrogen and oxygen.

If the chlorine is released into the troposphere during the day, it is quickly photolysed (in about 10 minutes at noon) into chlorine radicals, which near instantly react with methane, extracting a hydrogen atom. It should be possible for this to more than make up for small leaks of methane (or to counteract other independent sources of methane).