The given line chart depicts the proportion of NO2 emitted by four provided transports, which shows up to 130 km/h.
In general, the figures for buses and lorries share the same upward trend while petrol and diesel cars’ figures barely change. In addition, while buses are the vehicle produced NO2 emissions the most, the contrast rank of diesel cars can be observed.
Obviously, buses NO2 emission decreases in the first 60 km/h, start at 40 g/km to just above 35 g/km, then the figure recovers back to above 40 at 130 km/h. About 33 g/km NO2 emitted at 10 km/h can be witnessed in Lorries’ figure, then it drops to slightly under 20 g/km at 90 kph which gradually climb to 25 g/km onward. Additionally, both figures have a similarity change with decrease to 60 kph in the former and 90 kph in the latter; followed by a sharply increased in buses, the figure for lorries emission slowly increased and end almost half the other, respectively.
The emission of NO2 in petrol cars fluctuate around 10 g/km from 10 to 130 km/h. Diesel cars’ emission, however, start approximately 7 g/km at 10 km/h then slowly decrease to 5 g/km at 130 km/h. Moreover, the NO2 produced proportion of petrol cars mostly doubled the other at all speed.
