The ozone layer does not have ‘holes’ in the traditional sense, but it does have areas where the concentration of ozone is significantly reduced.
Most notably, the term ‘ozone hole’ refers to the thinning of the ozone layer over Antarctica, which occurs primarily during the Southern Hemisphere’s spring (September to November). This phenomenon is mainly caused by human-made chemicals known as chlorofluorocarbons (CFCs), which break down ozone molecules in the stratosphere.
The situation is not as clear-cut as counting holes; instead, it’s about understanding how human activity has affected the ozone layer globally. Efforts to reduce CFC emissions through international agreements like the Montreal Protocol have led to some recovery of the ozone layer, showing the importance of environmental action.