The given bar chart presents the daily minimum and maximum levels of SO2 and N2O which caused
pollution in 4 different cities (Los Angeles, Calcutta, Beijing and Mexico City) in the year 2000. Overall,
Mexico City was by far the most contaminated by the two mentioned pollutants among the four cities.
In Los Angeles, the quantity of SO2 emitted into the atmosphere was the lowest of all cities, with a
minimum average of 2 micro-grams per m3
and a maximum average five times as much, at 10 micro-
grams. The levels of N2O emissions were much higher with the maximum daily average level reaching
up to more than 100 micro-grams per m3. Meanwhile, the atmosphere in Mexico City was severely
polluted by SO2 and N2O emissions with the daily minimum and maximum averages of 80 and 113
micro-grams per m3
respectively.
In contrast to Los Angeles and Mexico City, the amount of pollution caused by N2O in Calcutta and
Beijing was less than that caused by SO2. The daily average maximum figures for SO2 emissions were
59 micro-grams per m3
in Calcutta and 130 micro-grams per m3
in Beijing while the average maximum
figures for N2O were just over 50 micro-grams per m3
in both cities.
The
given
bar chart presents the
daily
minimum and maximum levels of SO2 and N2O which caused
pollution
in 4
different
cities
(Los Angeles, Calcutta, Beijing and Mexico City) in the year 2000.
Overall
,
Mexico City was by far the most contaminated by the two mentioned pollutants among the four cities.
In Los Angeles, the quantity of SO2 emitted into the atmosphere was the lowest of all
cities
, with a
minimum
average
of 2 micro-grams per m3
and a maximum
average
five times as much, at 10 micro-
grams
. The levels of N2O emissions were much higher with the maximum
daily
average
level
reaching
up
to more than 100 micro-grams per m3. Meanwhile, the atmosphere in Mexico City was
severely
polluted by SO2 and N2O emissions with the
daily
minimum and maximum
averages
of 80 and 113
micro-grams per m3
respectively
.
In contrast
to Los Angeles and Mexico City, the amount of pollution caused by N2O in Calcutta and
Beijing was less than that caused by SO2. The
daily
average
maximum figures for SO2 emissions
were
59 micro-grams per m3
in Calcutta and 130 micro-grams per m3
in Beijing while the
average
maximum
figures for N2O were
just
over 50 micro-grams per m3
in
both
cities
.