Cool, heat-reflecting white rooms are already an urban climate solution that's been embraced in cities around the world.
凉爽且能反射热量的白色房间已是一种城市气候解决方案，在世界各地的城市中得到了应用。
In New York, more than ten million square feet [929,000 square metres] of rooves have been coated with white heat-reflecting paint.
在纽约，超过1000万平方英尺（92万9千平方米）的屋顶被涂上了白色的热反射涂料。
But these scientists say their ULTRA-white paint could make those rooves even cooler.
但这些科学家表示，他们的 “超白” 涂料可以使屋顶变得更凉爽。
While the whitest currently available paints reflect between 80 and 90 per cent of sunlight, these researchers say theirs reflects more than 98 per cent.
目前可用的最白涂料可以反射80%到90%的阳光，而这些研究人员说他们的涂料能反射98%以上的阳光。
Covering a 1,000 square foot [92.9 square metre] roof with this paint, they estimate, would provide more cooling power than a typical central air conditioner.
用这种涂料漆上1000平方英尺（92.9平方米）的屋顶，据科学家们估计，能比普通的中央空调提供更强的降温效果。
Prof Xiulin Ruan, Purdue University
Every one per cent of reflectance you get will translate to ten watts1 per metr
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