The sun heats the air causing it to rise. Rising air pulls in more air behind it. This is the main cause of wind. The planet rotates (which also directly affects wind) so there is constant change between day and night, meaning the same location inevitably heats and cools cyclically. Anytime one part of the atmosphere heats more than another part, it will cause wind so the only way to achieve equilibrium is for the sun to die (pretend it doesn’t destroy earth) and the planet freezes.
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