The two charts comapre the number of vehicles and the volume of CO2 production in the period between 2000 and 2020 in England and Wales.
It is clear that the number of every vehicle, specially car, grew steadily and this growth reflected directly on the amount of CO2 emission.
Looking at the line chart, it is clear that the number of vehicles was exactly 20 million in 2000. By the year 2010, this figure stood at approximately 35 million vehicles. Further on, the growth continued with a greater steep and reached just above 60 million by the end of the time mentioned.
Regarding the type of the vehicles and CO2 production, it is noticeable that the growth of vehicles reflected directly on this emission. Cars emited the hugest volume of CO2 in the time given. This figure started at around 2.25 kg of CO2 in 2000 and with a gradual increase, it reached at 3 kg of CO2. Similarly, trucks produced nearly 0.75 kg of CO2 initialy. Then, its figure experienced a gradual rise to approximately 1.25 in 2020. Conversely, vans and trucks did not witnessed substantial rises, they emited 0.5 and roughly 0.25 kg of CO2 in 2000 respectively. In the following years the figure of vans fluctuated around its initial amount (0.5 kg), and the figure of trucks stayed the same at nearly 0.5 kg of CO2 after experiencing a slight increase to this number in year 2010.
In summary, the growth of vehicles had a similar effect on the amount of CO2 production. Especially cars, which had the greatest impacts compared to other types of vehicles.