10 Super-Cool Ideas for Painting a Girl’s Bedroom. Story by Katie Dohman • 3mo. On the Dot . ... Stencil Style. Stencils are ...

This experimental paint reflects sunlight, emits heat and mimics sweating to cool buildings without air conditioning, even in the tropics.

This paint can cool surfaces by 8°F during the day, 19°F at night and, if painted on a roof, reduce the air conditioning needs of a building by up to 40 percent.

But these “cool paint” technologies are new, so it’s not yet clear how much they can make a difference when it comes to our actual experience of heat. One thing that is clear: ...