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Windows: No longer just for letting in the light

from Scientific American

The window revolution is long overdue. With the world’s metropolises rediscovering their love for skyscrapers, gleaming towers have evolved into fixtures of every cityscape. But the glass that covers them has hardly evolved at all. Temperature control is a big challenge. Eighteen percent of the money spent in the U.S. on energy goes to heating and cooling buildings. Of that, about $20 billion literally goes out the window on cold days, and even more leaks back into air-conditioned buildings in the summer, according to the Lawrence Berkeley National Laboratory. All told, over half the money spent on heating and cooling buildings is lost through windows. more

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