“Powering buildings costs America $430 billion a year and accounts for 40 percent of total energy use. Almost half of that is used for heating and cooling. Now scientists have given our oldest building material, wood, a makeover to make it eight times stronger, highly reflective, and able to radiate away building heat without using any power.

Scientists have long known that when thermal radiation is emitted, while most of it is absorbed by the atmosphere, a particular frequency isn’t allowing heat to escape into the freezing void of space. This process is known as radiative cooling, and engineers have been designing materials that exploit these frequencies in the hopes of creating an energy-free way of cooling things…”

For More: https://singularityhub.com/2019/05/28/wood-gets-a-makeover-to-provide-energy-free-air-conditioning/