The line graphs illustrate the extent of the ozone
hole
over Antarctica and the construction of Use synonyms
CFC-
11, Use synonyms
CFC-
12 and nitrous oxide gases from 1980 to 2000. The data is measured in Use synonyms
square
Use synonyms
km
and million Use synonyms
tonnes
.
Use synonyms
Overall
, it is evident that the size of the Linking Words
hole
over Antarctica increased over time, Use synonyms
whereas
the production of Linking Words
CFC-
11 decreased, and Use synonyms
CFC-
12 remained constant throughout the time.
By observing the chart, it can be seen that in 1980, the Use synonyms
hole
was 500 Use synonyms
square
Use synonyms
km
(in thousands), which inclined to 2000 Use synonyms
square
Use synonyms
km
in 1990 and began to decline for the next three years. By the end of 2000, the size of the Use synonyms
hole
recorded near 4000 Use synonyms
square
Use synonyms
km
.
Use synonyms
Furthermore
, the production of Linking Words
CFC-
11 was 70 Use synonyms
tonnes
in the initial year, which gradually dropped to around 5 million Use synonyms
tonnes
in 2000. Whilst around 25 Use synonyms
tonnes
of Use synonyms
CFC-
12 was produced in 1980, started to slightly increase and reached over 40 Use synonyms
tonnes
in 2000. Use synonyms
However
, the production of nitrous gas started in 1990 and after a decade it reached 30 million Linking Words
tonnes
.Use synonyms
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