The provided line graph illustrates data about the number of vehicles in England and Wales, while the bar chart shows the amount of CO2 emission from those vehicles between 2000 and 2020.
Overall, the number of vehicles, as shown in the graph, in both countries increased steadily over the years, while the bar chart shows the CO2 emission through different vehicles over three decades.
In 2000, the number of vehicles in England and Wales were recorded only 20 millions. The number surged to nearly 28 millions in 2005, while it went further high in 2010, i.e., 35 millions. Subsequently, it nearly crossed the 50 million barrier in 2015, and finally, in 2020, the number of vehicles increased to 60 millions.
The amount of CO2 emission by cars increased over the decades, i.e., 2.25 tonnes in 2000, 2.7 tonnes in 2010, and 3 tonnes in 2020. CO2 emission by buses, vans, and trucks in 2000 were 0.3, 0.5, and 0.7 tonnes, respectively. The amount increased in the following decade, such as 0.45 tonnes by buses, 0.7 tonnes by vans, and 0.9 tonnes from trucks. In 2020, the CO2 emission through buses and vans remained constant, while trucks contributed an increase in CO2 emission, i.e., 1.3 tonnes.