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September 08, 2011


Steve Johnson

What you're missing is that the hydrogen has to come from somewhere. We can't mine it from the Sun, it has to be produced, usually from non-renewable fossil fuel sources. That produces CO2 emissions in its own right and requires substantial energy input, which usually means more emissions.

Even assuming you have all the free green energy and raw materials you want to produce infinite amounts of hydrogen, you will then need to distribute it to the users. This involves the creation of a vastly expensive new infrastructure and expending yet more energy in doing so.

Fuel cells are interesting and due to their relative efficiency they might possibly have a place in our future. But there's no such thing as a free lunch.

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