Make photovoltaics cheap. Replace noble metals like platinum with abundant metals like iron. Split water with light. MIT chemistry professor Daniel Nocera explains:
"It’s hard for me to say exactly what that technology will look like, because the science is missing. But at the beginning of the 1900s, we built an entire society based on a new energy system. And I believe, once solar is in place, with help from biofuel, with a little help from wind, we will invent our society again from a new energy source."
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THE TEXAS SCRIBBLER 