The line graph illustrates the amount of nitrogen oxide emmisions produced by buses, petrol cars, diesel cars, and lorries.
Overall, while busses and lorries witnessed increases and decreases from 10 to 130 KPH, diesel cars and petrol cars remained unchanged.
The proportion of busses produced nitrogen oxide witnessed a dramatic drop from 40 to about 25 km between 20 and 60 speed. Afterwards, from 60 to 130 speed, the amount of nitrogen oxide hit a high of more than 40 km. In terms of lorries, there was a significant decline in the amount of nitrogen oxide from about 35 to 16 km between 10 and 90 KPH. Then, it experienced a growth to about 25 km.
On the other hand, diesel cars and petrol cars almost produced the same amount of nitrogen oxide emmisions and remained steady. While diesel cars accounted for 10 km, petrol cars made up 5 km.
