[doanminhduc1590]

The bar chart compares the differences in minimum and maximum levels of SO2 and N20 on a daily basis in 4 big cities in 2000( measured in micrograms per m3)
It is clear that Mexico city’s air pollutants were higher then other cities. While an average SO2 level was lowest in Los Angles, Beijing saw the least in average N2O level.
In terms of SO2 concentrations, the maximum of 200 micrograms was recored in Mexico city as opposed to 10 microgram in Los Angeles. The remarkable gap between Mexico and Los angeles could be seen in the lowest figures, with Mexico city’s minimum SO2 level being 40 times higher than Los Angeles’. Although Minimum amount of Co2 in Calcutta was twice higher than that of Beijing. Maximum amount of Cacutta was much twice lower than that of Beijing.
In terms of NO2 concentrations, The highest amount in Mexico city was 207, four times higher than the around 50 of Calcutta and Beijing, twice higher than 104 of Los Angeles. Regarding lowest amounts, The trend was set to continue with the highest of 113 in Mexico city.Both Calculta and Los Angeles remained below 40, three times higher than 14% of Beijing.

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[Phượng Anh]

here is the correction for your essay. hope it helps you.

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