The two line graphs provide information about the size of the ozone hole over Antarctica and the production levels of three ozone-depleting gases between 1980 and 2000.
Overall, the size of the ozone hole significantly increased from 1980 to 2000. Additionally, the production of CFC-12 and N₂O rose during this period, while the production of CFC-11 declined.
In 1980, the ozone hole was approximately 400 thousand square kilometers, marking its smallest size. By 2000, it had expanded to 3.6 million square kilometers. There was a minor decrease in the early 1990s, where the size dropped from 2 million to 1.2 million square kilometers, but it grew larger once again afterward.
In 1980, the production of CFC-11 was around 70 million tonnes. This level remained stable for the first two years but then decreased steadily, falling below 10 million tonnes by the late 1990s. In contrast, CFC-12 production increased from 25 million tonnes in 1980 to 50 million tonnes in 2000, even surpassing CFC-11 production in 1989. N₂O production did not begin until 1990, but after its introduction, it rapidly increased to about 40 million tonnes by 2000.