Band 6+: The bar chart illustrates the average daily minimum and maximum levels of SO2 and N2O being disposed of in four cities in the year 2000. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The bar chart illustrates the average daily minimum and maximum levels of SO2 and N2O being disposed of in four cities in the year 2000.

Overall, Mexico seemed to suffer the worst air problems, with the highest levels of SO2 and NO2, in contrast to Los Angeles, which recorded the lowest level of toxic fumes.

Mexico observed a roughly equal maximum amount of SO2 and N2O of approximately 200 micrograms per m3, dwarfing the minimum volume of the same pollutants, making it the most contaminated among the four cities. Meanwhile, Los Angeles was primarily polluted by N2O compared to SO2. The former was disposed of with maximum and minimum levels of 104 and 39 micrograms per m3 respectively while the latter was merely discharged with the maximum and minimum volumes below 10 micrograms per m3.

Beijing came next with the maximum and minimum SO2 levels of 130 and 25 micrograms per m3 correspondingly, whereas, the levels of N2O ranged from 14 to 54 micrograms per m3 on a daily basis. Calcutta showed a slight discrepancy in the amount of SO2 and N2O emitted, with the maximum and minimum volumes of 59 and 47 micrograms per m3 for the first, and 52 and 30 micrograms per m3 for the last.