In an effort to curb global warming, Purdue University engineers have created the whitest paint yet. Coating buildings with this paint may one day cool them off enough to reduce the need for air conditioning, the researchers say. The team created an ultra-white paint that pushed limits on how white paint can be. Now they've outdone that. The newer paint not only is whiter but also can keep surfaces cooler than the formulation that the researchers had previously demonstrated. "If you were to use this paint to cover a roof area of about 1000 square feet, we estimate that you could get a cooling power of 10 kW. That's more powerful than the central air conditioners used by most houses," said Xiulin Ruan, a Purdue Professor of mechanical engineering.
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