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The graph below shows the pollution levels in London between 1600 and 2000.

The graph below shows the pollution levels in London between 1600 and 2000. 02Y5

The line graph compares the levels of pollution from Sulphur dioxide and smoke in London from 1600 to 2000. Overall, it is clear that both of these has experienced fluctuation over the period, and decreased at the end of the period. In 1660, Sulphur dioxide and smoke stood near 0 cubic meters. Then, Sulphur dioxide has rose considerably and reached its peak between 1700 and 1750 at just above 750 cubic meters before declined steadily at 750 cubic meters in 1750. After it has leveled off roughly, it soared gradually to just under 1000 cubic meters by 1850. Then, it dipped at close to 750 in this respective year. By contrast, smoke increased steeply to roughly 350 cubic meters between 1850 and 1900. Before 1900, these figures have reached a peak at just over 750 cubic meters of Sulphur dioxide and just below 500 cubic meters of smoke. These figures have fluctuated and then declined gradually until fell over near to 0 cubic meters again in 2000.

The line graph compares the levels of pollution from Possible spelling mistake. 'Sulphur' is British English.Sulfur
Sulphur
 dioxide and You use this word too often, consider replacing it withexhaustmistgasfogsootsmog
smoke
 in London from 1600 to 2000.

Overall
, it is This phrase/word (depending on the context) can be potentially replaced with :apparent
clear
 that both of these has experienced fluctuation over the period, and decreased at the This phrase/word (depending on the context) can be potentially replaced with :expiration
end
 of the period.

In 1660, Possible spelling mistake. 'Sulphur' is British English.Sulfur
Sulphur
 dioxide and You use this word too often, consider replacing it withexhaustmistgasfogsootsmog
smoke
 stood near 0 cubic You use this word too often, consider replacing it withfeet
meters
. Then, Possible spelling mistake. 'Sulphur' is British English.Sulfur
Sulphur
 dioxide has Use the past participle "risen" after the modal (auxiliary) verb 'has'.risen
rose
considerably
 and reached its peak between 1700 and 1750 at This phrase/word is too simple and can be replaced with:merely
just
 above 750 cubic You use this word too often, consider replacing it withfeet
meters
This phrase/word is too simple and can be replaced with:previouslyprior to
before
 declined steadily
 at 750 cubic You use this word too often, consider replacing it withfeet
meters
 in 1750. After it has leveled off roughly, it soared gradually
 to This phrase/word is too simple and can be replaced with:merely
just
 under 1000 cubic You use this word too often, consider replacing it withfeet
meters
 by 1850. Then, it dipped at close to 750 in this respective year. By contrast, You use this word too often, consider replacing it withexhaustmistgasfogsootsmog
smoke
 increased steeply
 to roughly 350 cubic You use this word too often, consider replacing it withfeet
meters
 between 1850 and 1900.

This phrase/word is too simple and can be replaced with:previouslyprior to
Before
 1900, these figures have reached a peak at This phrase/word is too simple and can be replaced with:merely
just
 over 750 cubic You use this word too often, consider replacing it withfeet
meters
 of Possible spelling mistake. 'Sulphur' is British English.Sulfur
Sulphur
 dioxide and This phrase/word is too simple and can be replaced with:merely
just
 below 500 cubic You use this word too often, consider replacing it withfeet
meters
 of You use this word too often, consider replacing it withexhaustmistgasfogsootsmog
smoke
. These figures have fluctuated and then declined gradually
 until fell over near to 0 cubic You use this word too often, consider replacing it withfeet
meters
 again in 2000. 