The given graph shows the nitrogen oxide emissions produced by four vehicles. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The line graph illustrates the

emission

of nitrogen oxide in grams per kilometre by various types of vehicles

such

as lorries, buses, and petrol or diesel

cars

over the speed of 10 to 130 kilometres per hour.

Overall

, the data are fluctuating a little for the

cars

but remained fairly constant for the rest.

Firstly

, lorries and buses stayed in a similar status across the speed. Buses had the lowest

emission

of all at 7g/

km

at 10kph and

then

at 5g/

km

at 130kph.

This

was followed by lorries at just above 10g/

km

at the beginning and around 12g/

km

at the end

.

On the contrary

, diesel

cars

emit the highest at 40

g

/

km

at 10

kph

,

while

a petrol car emits about 33g/

km

at the same speed. The numbers

then

decrease rapidly to around 25g/

km

for diesel

cars

at 60kph before sharply rising to the highest

emission

at 42g/

km

at 130kph. The same goes for petrol

cars

as the

emission

declined to about 16g/

km

at 90kph but

then

rose to around 25g/

km

at 130kph.