The given line charts illustrates the ozone hole size in Artarctic as well as compares three kinds of damaging gases that have negative impacts on the Antarctic ozone over a period of 20 years from 1990 to 2000.
Overall, the Antarctic’s ozone hole size consistently increased throughout the entire period. Additionally, the production of Freon experienced a significant drop, while the opposite was true for NO2 and H2O2.
Regarding the size of ozone hole in Antarctic, initially, it started at 50,000 square kilometres before undergoing a dramatic surge to nearly 200,000, after which it reached the peak of approximately 240,000.
Concerning to the emission of three ozone-depleting gases, in 1980, Freon had the highest production among three figures, standing at about 150,000 square kilometres before hitting a record high of 200,000 in 1985. After that, it experienced a considerable plunge to precisely 20,000 over a 15-year period. In contrast, NO2 saw an upward trend. It started at roughly 100,000 square kilometres, continuing to remain relatively stable over a period of 10 years. Following this, the figure for NO2 significantly grew and reached at nearly 160,000, surpassing the production of Freon. Additionally, in 1980, H2O2 recorded 0 square kilometres, after 5 years, it experienced a considerable growth to roughly 20,000. In the next five years, it stayed unchanged, before soaring sharply to 60,000, overtaking Freon’s emission.