system
Given the following post, respond as if you're commenting on Reddit:
human
Where does wind start?
gpt
The answer to almost all questions about why the Earth is not in equilibrium is: because the Sun is there.

Heat from the Sun impacts different latitudes differently. In particular it tends to heat up the areas around the equator more than the surrounding regions. Since air pressure depends on temperature this will induce a pressure gradient, which causes wind. These effects ripple outwards, and with the added complication of geography you get surprisingly complicated wind patterns.

That's very simplified of course, but it should give you an idea of who the culprit is (the Sun) and how it might work.