The line graph illustrates how many micrograms of sulphur dioxide and smoke were in every cubic metre
The line graph illustrates how many micrograms of sulphur dioxide and smoke were in every cubic metre XyxAE
The line graph illustrates how many micrograms of sulphur dioxide and smoke were in every cubic metre as a measure of pollution in London from the 1570s to 2000.
Overall, even though sulphur dioxide pollution was almost always higher than smoke, both substances followed a relatively similar trend throughout the period. In addition, the number of smoke micrograms surpassed the figure for sulphur dioxide only once.
Originally, both kinds of pollution had a similar level close to 0 at the end of the 16th century. In the following 2 centuries, while sulphur dioxide level rose to around 750 micrograms per cubic metre, the figure for smoke was only 250. Afterwards, sulphur dioxide witnessed a peak of around 900 in the late 1840s, while the time for smoke level's maximum value equal to 400 was in the 1870s.
Beginning in the 20th century, both types of pollution began falling sharply. Interestingly, both figures started fluctuating heavily from the 1930s while generally declining. As a result, in 1950, the smoke level surpassed the sulphur dioxide level when both of them were slightly more than 250. However, this lasted for only a few years. Finally, at the end of the 2nd millennium, both numbers were around 0 just like the start of the period.
The line graph illustrates how
many
micrograms of
sulphur
dioxide and
smoke
were in every cubic
metre
as a measure of
pollution
in London from the 1570s to 2000.
Overall
,
even though
sulphur
dioxide
pollution
was almost always higher than
smoke
, both substances followed a
relatively
similar trend throughout the period.
In addition
, the number of
smoke
micrograms surpassed the figure for
sulphur
dioxide
only
once.
Originally
, both kinds of
pollution
had a similar
level
close to 0 at the
end
of the 16th century. In the following 2 centuries, while
sulphur
dioxide
level
rose to around 750 micrograms per cubic
metre
, the figure for
smoke
was
only
250. Afterwards,
sulphur
dioxide witnessed a peak of around 900 in the late 1840s, while the time for
smoke
level's maximum value equal to 400 was in the 1870s.
Beginning in the 20th century, both types of
pollution
began falling
sharply
.
Interestingly
, both figures
started
fluctuating
heavily
from the 1930s while
generally
declining.
As a result
, in 1950, the
smoke
level
surpassed the
sulphur
dioxide
level
when both of them were
slightly
more than 250.
However
, this lasted for
only
a few years.
Finally
, at the
end
of the 2nd millennium, both numbers were around 0
just
like the
start
of the period.