If you think solar is still too expensive, here’s how to get more bang for your solar-cell buck. Take a small solar cell, and slice it into thin slivers. Wrap the slivers around the edges of a slab of glass. Paint the glass with a high-tech, but cheap, dye, which you bought online, and voilé! You have a new solar panel. It can collect much more energy than the pricey cell you started with, and it costs only a little more. «more»
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