What would have happened to the ozone layer if chlorofluorocarbons (CFCs) had not been regulated in the 1986 Montreal Protocol ? This NASA Goddard model runs...
NASA | Exploring Ozone
Ozone Layer Depletion HD
See the Hole in the Ozone Layer (1979 - 2012)
Discovery of the ozone hole | Natural History Museum
Ozone Hole Video for Kids
The Earth's Ozone Hole from 1979-2007
What Would have Happened to the Ozone Layer ?