The chart illustrates the levels of air pollution in three major cities:City A, City B, and City C between 2010 and 2020. Overall, the level of air pollution in City B decreased slightly, before increasing over the period. However, the level of air pollution in City A experienced a downward trend, while the level of air pollution in City C experienced an upward trend before decreasing slightly.
The level of air pollution in City B increased sharply between 2010 and 2017, and decreased slightly from 2017 and 2020, constituting 70. Moreover, the level of air pollution in City B was the highest of the three different major cities.
However, the level of air pollution in City A had experienced a downward trend to 65 by 2020. Furthermore, the level of air pollution in City C experienced an upward trend between 2010 and 2015, making up 50, and decreased slightly from 2015 to 2020, accounting for 45, and was the lowest of the three different major cities.
