The line graph presents data on pollution
levels
of Use synonyms
sulphur
Use synonyms
dioxide
and smoke in London from 1600 to 2000. Use synonyms
Overall
, the two pollutants showed a similar trend, with Linking Words
sulphur
Use synonyms
dioxide
consistently recorded at higher Use synonyms
levels
.
Regarding Use synonyms
sulphur
Use synonyms
dioxide
, Use synonyms
levels
increased substantially from approximately 10 in the initial year to 700 in 1675, and rose Use synonyms
further
to just over 750 in 1725. Linking Words
Although
Linking Words
this
figure fell back to roughly 700 in the following years, it climbed again and peaked at 900 in 1850. After 1900, Linking Words
sulphur
Use synonyms
dioxide
Use synonyms
levels
decreased gradually, falling to nearly zero by 2000, despite some fluctuations around 1950.
As for smoke, Use synonyms
levels
grew steadily over three centuries to nearly 500 in 1900, making it the highest level recorded for Use synonyms
this
pollutant. Linking Words
However
, it experienced a slight decline to about 300 Linking Words
thereafter
, followed by rapid oscillations until 1975. By 2000, London was virtually free from smoke pollution, as Linking Words
levels
dropped to close to zero.Use synonyms