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

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

such

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as lorries, buses, and petrol or diesel

cars

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over the speed of 10 to 130 kilometres per hour.

Overall

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, the data are fluctuating a little for the

cars

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but remained fairly constant for the rest.

Firstly

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

emission

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of all at 7g/

km

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at 10kph and

then

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at 5g/

km

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at 130kph.

This

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was followed by lorries at just above 10g/

km

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at the beginning and around 12g/

km

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at the end

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.

On the contrary

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, diesel

cars

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emit the highest at 40

g

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/

km

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at 10

kph

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,

while

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a petrol car emits about 33g/

km

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at the same speed. The numbers

then

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decrease rapidly to around 25g/

km

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for diesel

cars

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at 60kph before sharply rising to the highest

emission

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at 42g/

km

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at 130kph. The same goes for petrol

cars

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as the

emission

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declined to about 16g/

km

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at 90kph but

then

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rose to around 25g/

km

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at 130kph.