Why are the holes in the ozone layer over the poles?



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    Particularly in the Antarctic, the poles experience strong winds known as a “polar vortex.”  These winds cause the formation of clouds known as Polar Stratospheric clouds.  These clouds only form during the winter in Antarctica and the Arctic zone and trap pollutants in a concentrated area, speeding up the process of ozone breakdown. Once spring comes, the clouds burn off and the combination of strong sunshine and long days increase the breakdown of ozone.  

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