The first line graph illustrates the ozone hole size over Antarctica (Square Km), while the second line graph provides information about the production level of three damaging gases, including CFC-11, CFC-12, and N2O, between 1980 and 2000.
Overall, the graphs reveal that the size of the ozone hole experienced growth in the first decade, then it fluctuated with an upward trend to reach a peak. In addition, the CFC-11 was consistently the most significant source of gases production at the beginning, but was overtaken by CFC-12, which experienced a gradual increase throughout the period.
Looking at the details, the size of the ozone hole over Antarctica increased gradually from approximately 350 square km to around 2000 square km between 1980 and 1990. In contrast, the size continued to rise with some fluctuations, peaking at over 4000 square Km in 2000.
The CFC-11 production levels started at around 70 tonnes in 1980, then saw a significant decline from 1985 to 1995, and stood at nearly 20 tonnes. In contrast, between 1980 and 2000, CFC-12 witnessed a gradual growth from almost 26 tonnes to 60 tonnes, which became to the highest level of production among gases. As regards N2O, the production level increased substantially and reached a peak of around 40 in 2000.