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add a proton into Carbon and you get Nitrogen, do this 2 times.

take 1 Carbon and 1 Nitrogen and you get 1 Aluminium, do this twice

Take two Aluminium and you get 1 Iron atom,

First shown by George Ohsawa in 60s +, replicated all over the world, in one Indian plant they were producing 4 tonnes of excess Iron per day!

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