Long before the advent of fans and air-conditioners, mankind used to take shelter from the sun using a natural the shade i.e. trees or an area protected from sun. It is quite common that the temperature in a shaded area is cooler by some 10 degrees to 16 degrees Fahrenheit. Along with a difference in temperature, the human body feels much cooler and comfortable by having the direct solar radiation of the sun blocked in the shade. With shade...
