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The image presents a line graph of nitrogen oxide emission (g/km) versus speed (kph) for four vehicles, with the y-axis ranging from 0 to 45 and the x-axis from 10 to 130. For the Diesel car, emissions in g/km at speeds of 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, and 130 kph are approximately: 6.5, 6, 5.5, 5.2, 5.1, 5, 5, 4.9, 4.9, 4.9, 4.8, 4.8, and 4.8. For the Petrol car, the corresponding emissions are: 11, 11.2, 10.5, 10, 10.1, 9.5, 9.5, 9, 9, 9.5, 10, 10.5, and 11.5. For Lorries, the emissions are: 33, 31, 29, 27, 25, 23, 20, 18, 16, 18, 20, 22, and 24. For Buses, the emissions are: 40, 37, 34, 32, 30, 26, 29, 32, 34, 36, 38, 40, and 42.
Given the complexity of the image, the above description may not be entirely accurate.
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The line chart compares four different types of vehicles against the pollution produced by them in terms of nitrogen oxide emissions.
Overal, the information is shown in grams of nitrogen oxide produced per kilometre in the Y-axis, and vehicle speed is shown in kilometres per hour in the X-axis. In addition to this clarification, it is clearly seen that the buses are the largest producers of these types of emissions at any speed registered, followed by lorries and petrol cars, while diesel cars are the lowest pollution producers.
Regarding the trends in the graph, petrol and diesel vehicles have a minimal variation around 10 G/KM and 5 G/KM, respectively, whereas lorries emissions decreases as the speed increases, staring from over 30 G/KM at 10 KPH, to about 15 G/KM at 90 KPH. This is the same case as buses, where nitrogen oxide levels starts in 40 G/KM at 10 KPH, and goes down to over 25 G/KM at a velocity of 60 KM/H.
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