Band 6+: The pie chart shows the percentage of nitrogen oxide produced by different types of vehicles in London in 2020. Summarize the data by selecting and reporting the key features and make comparisons where relevant.

The pie chart illustrates the proportions of nitrogen oxide emissions emitted by six different kinds of vehicles in London during the year 2020.

We can see clearly that buses occupied the largest percentage, which accounted for 32% nitrogen oxide emissions. In contrast, motorbikes had the least proportions among various transportations, with mere 1% of total. Additionally, it is interesting to note that both taxis and cars followed closely and had the exact same proportion, making up about 20% respectively of total. In more detail, Vans account for around 14% of emissions. Lorries are expected to produce slightly less pollution than vans at 12%.

Overall, the amount of emissions are related to the size of the car. Buses which had the biggest size, produced the most pollution in London in 2020, while motorbikes with the smallest size had the least nitrogen emissions.