The line graphs show the size of the ozone hole over Antarctica and the generation of three ozone-damaging gases over two decades, starting from 1980.
Overall, it is clear that while the generation of CFC-12 and N20 surged, CFC-11 witnessed an opposite trend. Furthermore, the ozone hole expanded during this period.
On the one hand, between 1980 and 1990, the amount of CFC-11 stood at approximately 70 tones in 1980, which was higher than the 30 tones of CFC-12. In Addition, the ozone hole size started at under 500 Square kilometers. While the ozone hole size rose gradually and reached around 2,000, by 1990, the B gas had surpassed the A gas at around 40 tones.
On the other hand, from 1990 to 2000, the size of the ozone hole and the B gas surged, whereas the A continued its reducing trend. Furthermore, the generation of the C gas started in 1990 and ended at around 35 tones in 2000. The production of B gas finished at approximately 50 tones, which was more than the 5 tones of the A gas; meanwhile, the expansion of the ozone hole finished at around 4,000.