The line graph illustrates the amount of nitrogen oxide emitted by 4 different means of transport at various speeds.
It is clear that
buses took up the largest percentage of nitrogen oxide emissions, followed by lorries. Meanwhile, diesel and petrol cars were more environmental-friendly. Linking Words
In addition
, the proportion of that emitted by these 2 vehicles Linking Words
also
witnessed stability at any speed.
As can be seen, the amount of NO released by buses was 40g/Linking Words
km
at 10 Use synonyms
kph
. It decreased to 25g/Use synonyms
km
as buses got faster at 60 Use synonyms
kph
but Use synonyms
then
rose and reached a peak of over 40g/Linking Words
km
at 130 Use synonyms
kph
. Use synonyms
Likewise
, lorries created 32.5g/Linking Words
km
at the slowest speed . The figure for that kept dropping to approximately 15g/Use synonyms
km
as the lorries' speed got to 90 Use synonyms
kph
and increased again to nearly 25g/Use synonyms
km
at maximum speed.
Use synonyms
By contrast
, petrol and diesel vehicles discharged less emission. The sum of NO emitted by diesel cars remained unchanged at 5g/Linking Words
km
at any speed. Use synonyms
Similarly
, cars run on gasoline Linking Words
also
produced a stable total, which stood at 10g/Linking Words
km
.Use synonyms
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