Band 7+: You should spend about 20 minutes on this task The given graph shows the nitrogen oxide emissions produced by four vehicles. Summarize the information by selecting and reporting the main features and making comparisons where relevant. You should write at least 150 words.

The line graph illustrates the amount of nitrogen oxide emissions from four kinds of transportation.

Overall, it is clear that there is a similar trend in buses and lorries, with buses witnessing the most dramatic rise. While having some fluctuations, diesel and petrol cars remain stable at a lower figure.

There is a sharp decrease in buses from 40g/km to nearly 25g/km at 60 KPH, before rising significantly and reaching a peak at 42g/km at the end of the period. Similarly, the trunk, the figure for realizing nitrogen oxide into the air begins at 33g/km, then falls significantly, reaching a low of 15g/km at 90 KPH, after which it rises by 10g/km in the following speed levels.

The production of a petrol car is at 11g/km, followed by a slow decrease to approximately under 10g/km at 30 to 110 KPH, but later slightly grows to 12 g/km. Meanwhile, the amount of nitrogen oxides from a diesel car roughly decreases from 6 to 5g/km at the end of the stage.