JoinScience 101: What causes wind?
There’s a quick and easy answer to this question. The Sun causes wind. Exactly how the Sun causes wind takes a bit to explain. We’ll begin with what wind is. You’ve no doubt heard that wind is the motion of air molecules, which is true. Putting aside the huge leap of faith it takes for us to believe that we are experiencing the motion of millions of tiny things we can’t see, we need to investigate what causes the motion of these invisible molecules.