The given line graph compares the nitrogen oxide emissions from buses, lorries, petrol cars
and diesel cars. It can be seen from the graph that the maximum emissions are from buses
and the emissions vary with the speed of the vehicle.
At a speed of 10kph, buses produce 40 g/km emissions. However, as the speed of the bus
increase to 60 kph, the emissions decrease gradually and reach a little over 25 g/km. It is
interesting to note that if the speed of the bus goes beyond 60 kph, the emissions again begin
to rise, and at a speed of 130 kph the emissions are over 40 g/km. Lorries also show a similar
pattern but the overall emissions are lower than that from buses. Another point of difference
is that emissions decrease till the speed of 90kph and only after that, begin to rise again.
The emissions from diesel car and petrol car show a similar pattern and also do not show
much variation with speed. Emissions from diesel car are the least and hover around 5 g/km
and those from petrol car are around 10g/km.
Overall, emissions from lorries and buses follow a similar pattern and those from diesel and
petrol cars follow a similar pattern.
The
given
line graph compares the nitrogen oxide
emissions
from buses, lorries, petrol cars
and
diesel
cars
. It can be
seen
from the graph that the maximum
emissions
are from
buses
and
the
emissions
vary with the
speed
of the vehicle.
At a
speed
of 10kph, buses produce 40 g/km
emissions
.
However
, as the
speed
of the bus
increase
to 60 kph, the
emissions
decrease
gradually
and reach a
little
over 25 g/km. It
is
interesting to note that if the
speed
of the bus goes beyond 60 kph, the
emissions
again
begin
to
rise, and at a
speed
of 130 kph the
emissions
are over 40 g/km. Lorries
also
show
a
similar
pattern
but
the
overall
emissions
are lower than that from buses. Another point of
difference
is
that
emissions
decrease till the
speed
of 90kph and
only
after that,
begin
to rise again.
The
emissions
from
diesel
car
and petrol
car
show
a similar pattern and
also
do not
show
much
variation with
speed
.
Emissions
from
diesel
car
are the least and hover around 5 g/
km
and
those from petrol
car
are around 10g/km.
Overall
,
emissions
from lorries and buses follow a similar pattern and those from
diesel
and
petrol
cars
follow a similar pattern.