The line graph illustrates the pollution rate in London from 1600 to 2000. Overall, it can be seen that the level of sulphur dioxide was higher than the smoke rate throughout 400 years. Also, both categories of pollution experienced fluctuations almost during the whole period.
Focusing on sulphur dioxide, it started to rise a little before 1600. Then, the level of this grew gradually until 1680. After that, sulphur dioxide emissions hovered at just under 750 micrograms per cubic metre and after that this showed fluctuations from 1700 to 1850, reaching its highest point at around 875. Finally, the sulphur dioxide pollution rate saw a significant decrease since 1850, following some oscillations between 1920 and 1970 and stood at almost zero micrograms per cubic metre.
As for the smoking pollution, there was a marginal increase from the beginning of the period with some variations between 1700 and 1750. Then, it continued to grow and reached a peak of approximately 450 micrograms per cubic metre in 1870. Subsequently, smoking pollution rate plunged, swinging from 1920 to 1970. Eventually, The figure of smoke was arounds zero by 2000.