Hole over Antarctica requires two conditions:
Sunlight just returning to polar region
Circumpolar vortex- a mass of cold air that circulates around the southern polar region
Isolates it from the warmer air in the rest of the planet
Polar stratospheric clouds form
Enables Cl and Br to destroy ozone
Higher levels of UV-radiation hitting the earth
Eye cataracts
Skin cancer (right)
Weakened immunity
May disrupt ecosystems
May damage crops and forests