The line graph provides the data on the amount of air pollution in London over a span of three centuries, between 1575 and 2000, measured in micrograms per cubic metre. Overall, sulphur dioxide consistently reported the highest propotion.
Starting with the same point, both types of pollution increased throughout the next 200 years, however, sulphur dioxide had risen rapidly, reaching over 750 micrograms in the air. Respectively, smoke followed a similar pattern, reaching around 250 in the middle of 1700s. After experiencing a robust upward trajectory, both types of pollution plummeted back to levels seen in the 1700s. Meanwhile, after that checkpoint, both figures displayed sharp fluctuations with a rapid decrease. These reductions continued and returned to the initial position by 2000.
In conclusion, despite the highest rate, with the peak pollution level reached 800 micrograms per cubic metre due to sulphur dioxide. Therefore, both types of air pollution plunged sharply by the end of the period.