A two-layered paint reflects infrared light (红外线) while maintaining its colour could help keep buildings and vehicles cool under hot sun. This could help reduce energy used in cooling.
This coating (develop) by Yuan Yang at Columbia University in New York and his colleagues. It consistsa top layer, which provides the colour, and a bottom layer reflecting infrared light.
When the sun shines on object coated with this paint, the top layer absorbs certain light, while the bottom layer reflects infrared light, preventing the object from (heat) up. A similar cooling effect can be achieved using white paint or metal mirrors, Yang says the advantage of this new paint is that it can be any colour desired. (usual) black paint absorbs heat, but painting an object with a black version of this new coating kept it about 16%: (cool) than when an object painted with commercial black paint was exposed to the same amount of sunlight.
This new paint could be(use) in tropical locations to help keep(building) cool, as well as to prevent cars, buses and trains from getting too hot.
