by Tran Quang Duy
(Nha Trang City, Vietnam)
The figures compare a lot of CO2 that emitted annually by cars, buses, vans and trucks, and illustrate data on the number of vehicles in England and Wales over a period of 20 years from 2000.
Overall, the graphs showed an upward trend during the research period, with an exception for the amount of buses’ CO2 emission. It is also noted that the figures for cars were significantly higher than those from vans and trucks.
Looking at the bar chart, the highest level of CO2 emission came from cars (from 20 tons to nearly 26 tons), whereas, the opposite was true of buses’s CO2 emission, remaining the same over the period surveyed, hitting the lowest point at 8 tons. Meanwhile, the amount of CO2 which was emitted by vans experienced a slight rise of 1 tons each decade. Finally, the figure for CO2 emission from trucks was a significant increase of 2 tons and 6 tons each decade respectively.
Of the line graph, the figure for vehicles showed a steady increase, rising by 20 millions each decade. They rocketed from the high point of 20 millions, hitting the greatest point of nearly 60 millions.
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