Ozone Depletion timeline By Caylum Aug 22, 1970 1970 damage to this protective layer caused by atmospheric pollution Aug 22, 1974 1974 chlorofluorocarbons (CFCs), widely used in aerosol spray cans, would seriously damage the ozone layer Aug 23, 1980 The ozone layer above the Antarctic has been particularly impacted by pollution since the mid-1980s. Aug 23, 1985 1985- British scientists produced the first direct evidence that this was actually happening. Aug 23, 1987 1987- the combination of continuing cold conditions with sunlight brought the greatest rate of ozone depletion. Aug 22, 2006 Spring 2006 discovered ozone levels over Antarctica the thinnst ever observed Aug 23, 2013 1987- agreed to freeze production at 1986 levels and gradually cut it back, eventually eliminating use of the chemicals