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Air quality is not only affected by air pollution, but meteorology also plays a large role. Weather can significantly impact air quality, as different aspects of the weather affect the amounts of ozone and particulates that are present in a specific area. Sunshine, rain, higher temperatures, wind speed, prevailing winds, air turbulence, and mixing depths all affect pollutant concentrations.

To find more information on how wind and weather affect air pollution see here:

https://www.iqair.com/us/us/newsroom/wind-weather-air-pollution