Local winds are caused by either topographic effects or by variations in surface composition. By the term surface composition, it actually means the land and water that is present locally. Local winds are not found everywhere but in certain specific areas around the globe. I hope the answer comes to your help.
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Nitrogen (78%), Oxygen (21%), Argon (0.9%), and the remaining 0.1% consists of traces of neon, krypton xenon, carbon dioxide, nitrogen oxides, and traces of others. so Nitrogen is the greatest. I hope this helps :)
The movement of material due to differences in density is called Convection.