White roofs reduce the temperature in the city

The idea of ​​painting roofs and roads white to combat carbon emissions in the air for several years. It seems obvious, simple and efficient, but nonetheless almost never been implemented.

According to research by scientists from the Lawrence Berkeley National Laboratory, white coating roofs and sidewalks makes the urban atmosphere literally cooler. The buildings with white roofs reflect far more sunlight, consequently, within such premises to be comfortable, especially in the hot summer days. In addition, it saves energy for air conditioning.

Buildings with dark roofs heated space beneath them, and the heated air is distributed with the wind, raising the temperature of the surrounding air and creating a so-called "effect of the urban heat island." Dark roofs also radiate energy back into the atmosphere, where it is absorbed by clouds, and contributes to the greenhouse effect.

via factroom.ru