Earth's ozone layer holes over polar regions, where the stratospheric ozone level is significantly depleted, have been a prevalent feature of climate change news in recent decades. Anthropogenic-sourced chlorofluorocarbons (CFCs) are the primary cause, released from household items such as coolants in fridges, air conditioners and spray cans. Restricting their use has been and remains paramount to ozone hole recovery as they have multi-decadal lifetimes in the atmosphere.