Wind is mainly caused by air convection. This is a weather phenomenon.
When the earth is irradiated by sunlight, different places are heated to different degrees, resulting in different air pressures, which make the air flow and produce wind. The weight of air causes air pressure, and the air pressure in different areas varies according to the air density, topography, temperature and latitude, so high and low pressure air masses are produced. When the air mass with high pressure naturally flows to the air mass with low pressure, this thrust is called wind.
It's windy in your house now, probably because the building is high and the door is facing the wind.
Here is the address/epaper/xkb/html/2007-11/21/content _ 68840.htm.