Researchers at the Worcester Polytechnic Institute have figured out another use for our planet's millions of miles of asphalt roads. Using heat exchangers embedded just below the surface, the system would soak up, and convert all of the (normally wasted) sunlight absorbed by the asphalt into usable electricity. They also envision placing heat conducting water filled pipes beneath the road that would heat water to be used for home heating or, converted to electricity through a thermoelectric generator.

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