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See-through film rejects 70 percent of incoming solar heat
Now MIT engineers have developed a heat-rejecting film that could be applied to a building's windows to reflect up to 70 percent of the sun's incoming heat. The film is similar to transparent plastic wrap, and its heat-rejecting properties come from tiny microparticles embedded within it. In their more compact configurations, the microparticles give the normally transparent film a more translucent or frosted look.
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