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Joni Mitchell was wrong when she sang out against paving paradise and putting up a parking lot. Ok, maybe not. Still, we think the demonstration project just built by the folks over at Solar Roadways would get a pass from the Canadian singer-songwriter. That's because the real estate in question is covered with a textured glass surface that can, among many other things, generate low-carbon electricity, melt snow, and throw up safety warnings with its integrated LED lighting system.

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Remember way back when we mentioned that Tesla's Gigafactory for batteries might prove to be a good investment opportunity, with its potential to bring cell prices down to a level that could make the forthcoming Tesla Model E affordable, not to mention attractive for massive amounts of renewable energy storage? Well, today the automaker's share price popped – we'd say exploded, but it's not as alliterative – up over 15 percent to hit an all-time $259.20 high. It seems market analysts

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