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The so-called road radiators consist of sheets of carbon nanofiber that heat concrete with help from an electrical element. Heating a block from -10 C to 0 C takes jut two hours and 6 watts of power. That’s a relatively small amount of energy, but heating up whole roads could be extremely power-intensive.

Link: www.inhabitat.com/(…)self-heating-roads-save-cars-f…

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