The graphs below show the size of the ozone hole over Antarctica and the production of three ozone-damaging gases from 1980 to 2000. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

A glance at the first figure provided illustrates the changes in the size of the

ozone

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hole

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from 1980 to 2000;

while

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the second one compares the

production

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of three detrimental gases to the

ozone

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layer during the same period. In general, not only did the existing

hole

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in the

ozone

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layer enlarge but the

production

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of some harmful gases climbed. It is evident from the information supplied that the

ozone

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hole

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expanded during that time. From a negligible 300

square

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km

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in 1980, the size of the

ozone

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hole

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reached 2000

square

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km

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in 1990.

Although

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it shrank to 1000

square

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km

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in 1992, it again extended and peaked at approximately 3700

square

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km

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in 2000. With regard to the damaging gases, the

production

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of CFC-12 experienced a stable growth, reaching from 30

tonnes

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in 1980 to about 43

tonnes

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in 2000. In stark contrast,

however

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, producing CFC-11 plunged from a peak of 70

tonnes

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in 1980 to 2

tonnes

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in 2000. Noticeably, there was no trace of N2O until 1990;

Nonetheless

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, after that its

production

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increased, reaching 25

tonnes

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in 2000.