I meant hydrogen in fuel cells for heavy equipment. Concrete can be made then in a green way. There is a guy that I read about that’s making “hempcrete”. It’s supposedly fairly strong and very green. Ore could be harvested the same for iron and steel. Polymers… we’ll stick up the creek without a paddle. But cellulose and other green fibers are being worked with to substitute in some instances. So maybe that’s the direction for that.
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