Pollution levels in London, micrograms per cubic metre
Pollution levels in London, micrograms per cubic metre 9R0r
The grah shows how the pollution level due to sulphur dioxide and smoke varied in London between 1600 and 2000. The data clearly reveals that the level of both pollutants formed a similar pattern during this period, but there were always higher levels of sulphur dioxide than smoke in the atmosphere.
In 1600, pollution levels were low, but over the next hundred years, thr levels of sulphur dioxide rose to 700 micrograms per cubic metre, while the levels of smoke increased gradually to about 200 micrograms pwr cubic metre. Over the next two hundred years the levela of sulphur dioxide kept on increasing, although there was some fluctuation in tjis trend which reached a peak in 1850. Smoke levels increased a little more sharply during this time and peaked in 1900 at about 500 micrograms. During the 20th century, the levels of both pollutants fell dramatically, reporting a great deal of erratic pattern within this fall.
Clearly, in London, the pollutants were a bigger problem only during the middle of the evaluation period and their presence was nil towards the beginning of the next century.
The
grah
shows
how the pollution
level
due to
sulphur
dioxide and
smoke
varied in London between 1600 and 2000. The data
clearly
reveals that the
level
of both pollutants formed a similar pattern during this period,
but
there were always higher
levels
of
sulphur
dioxide than
smoke
in the atmosphere.
In 1600, pollution
levels
were low,
but
over the
next
hundred years,
thr
levels
of
sulphur
dioxide rose to 700 micrograms per cubic
metre
, while the
levels
of
smoke
increased
gradually
to about 200 micrograms
pwr
cubic
metre
. Over the
next
two hundred years the
levela
of
sulphur
dioxide
kept
on increasing, although there was
some
fluctuation in
tjis
trend which reached a peak in 1850.
Smoke
levels
increased a
little
more
sharply
during this time and peaked in 1900 at about 500 micrograms. During the 20th century, the
levels
of both pollutants fell
dramatically
, reporting a great deal of erratic pattern within this fall.
Clearly
, in London, the pollutants were a bigger problem
only
during the middle of the evaluation period and their presence was nil towards the beginning of the
next
century.