How to effectively utilize natural conditions to build tents - wind direction

The direction in which fine sand floats is the wind direction 

Ventilation openings (doors & windows)should follow the wind direction 

The benefits of this ventilation 

In summer, air convection produces a cooling effect 

In winter, the wind blows into the tent that is being heated by a fire,reducing the carbon monoxide content 

In spring and autumn,the wind blowing into the tent makes people feel the fresh air