The "hole" is actually a location from the stratosphere with incredibly minimal concentrations of ozone that reoccurs annually firstly in the Southern Hemisphere spring (August to October). For info on user permissions, remember to browse our Terms of Assistance. When you've got questions on ways to cite anything at all https://healthbrown.com/2024/08/18/harnessing-ozone-generators-for-home-and-commercial-use-air-purification-solutions-and-indoor-air-quality-improvement/