New hardware uses concentrated solar to produce hydrogen

Arstechnica: When it comes to the available sources of renewable energy, most of the focus is on the Sun, since all the other sources, like wind and biomass, are ultimately derived from it. But solar presents its own challenges, since it's most easily converted into heat or electricity, and we can't store either of these at a high enough density for uses like transportation. This explains why there's a lot of effort going into things like biofuels and using electricity to produce hydrogen. Each additional step, however, involves a potential inefficiency.

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