Minimum and Maximum Levels of Two Air Pollutants
You should spend about 20 minutes on this task.
The chart below shows the average daily minimum and maximum levels of two air pollutants in four big cities in 2000.
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.
Write at least 150 words.
Get your personalised IELTS Essay Feedback from a former examiner
Download IELTS eBooks, get everything you need to achieve a high band score
Sample Answer 1
The column chart illustrates the average daily minimum and maximum levels of two air pollutants—Sulphur Dioxide (SO2) and Dinitrous Oxide (N2O)—in four major cities: Los Angeles, Calcutta, Beijing, and Mexico City in the year 2000.
Overall, the chart shows that Mexico experienced the highest pollution levels compared to the other three cities. Both pollutants, Sulphur Dioxide and Dinitrous Oxide, were found in much larger concentrations in Mexico, indicating significantly higher air pollution in this city. In contrast, Los Angeles had the lowest presence of Sulphur Dioxide, with minimal levels reported. The fluctuations in pollution levels across the four cities demonstrate substantial regional differences in air quality.
In terms of Sulphur Dioxide, the minimum concentration in Los Angeles was as low as 1 unit, with a maximum of just 10 units. On the other hand, Mexico registered the highest range, with SO2 levels varying between 80 and 200 units. Calcutta had a minimum level of 47 units and a maximum of 59, whereas Beijing exhibited slightly more variation, ranging from 25 to 130 units.
When it comes to Dinitrous Oxide, Mexico again reported the highest levels, with concentrations ranging from a minimum of 113 to a peak of 207 units. In comparison, the other cities experienced far lower amounts. Los Angeles had a range from 39 to 104 units, Calcutta reported a fluctuation between 30 and 52 units, and Beijing recorded N2O levels between 14 and 80 units, showing a far smaller concentration than Mexico.
Download IELTS eBooks, get everything you need to achieve a high band score
Sample Answer 2
The bar chart compares the average daily minimum and maximum levels of two air pollutants—Sulphur Dioxide (SO2) and Dinitrous Oxide (N2O)—across four major cities: Los Angeles, Calcutta, Beijing, and Mexico City, during the year 2000.
Overall, the air quality in Mexico City stood out with both pollutants recorded at their highest levels among the four cities, whereas Los Angeles reported the lowest concentration of Sulphur Dioxide. The fluctuations in pollution levels indicate significant regional differences, with Mexico experiencing the most severe pollution. Meanwhile, the data reveal that Beijing, Calcutta, and Los Angeles exhibited relatively lower but varied levels of these pollutants.
When focusing on Sulphur Dioxide, Los Angeles reported remarkably low pollution, with values ranging from 1 to 10 units, the smallest margin among the cities. Conversely, Mexico City had the highest concentration, with levels fluctuating between 80 and 200 units. Calcutta and Beijing showed moderate ranges, with Calcutta reporting a maximum of 59 units and Beijing exceeding that, reaching a peak of 130 units, the second-highest among the four.
Regarding Dinitrous Oxide, Mexico again led with the highest pollution, recording levels between 113 and 207 units. In comparison, Los Angeles showed a wider but lower range, with N2O levels varying from 39 to 104 units. Calcutta registered slightly lower concentrations, ranging between 30 and 52 units, while Beijing recorded the least N2O pollution, with a range of 14 to 80 units, indicating comparatively cleaner air.
Sample Answer 3
The bar chart illustrates the average daily minimum and maximum levels of two air pollutants—Sulphur Dioxide (SO2) and Dinitrous Oxide (N2O)—measured in four major cities, namely Los Angeles, Calcutta, Beijing, and Mexico City, during the year 2000.
Overall, Mexico City exhibited the highest pollution levels, with both SO2 and N2O reaching their peaks among the four cities. In contrast, Los Angeles registered the lowest figures for Sulphur Dioxide, indicating relatively cleaner air in terms of this pollutant. The other cities, such as Calcutta and Beijing, demonstrated moderate levels, showing considerable differences in pollution distribution across regions.
In terms of Sulphur Dioxide, Los Angeles recorded minimal levels, ranging between 1 and 10 units. On the other hand, Mexico City reported the highest concentration of this pollutant, with a range from 80 to 200 units. Calcutta’s readings were relatively moderate, with SO2 levels peaking at 59 units, whereas Beijing presented a broader variation, reaching up to 130 units at its maximum.
Dinitrous Oxide followed a similar pattern, with Mexico City leading in pollution levels. The range for N2O in Mexico was between 113 and 207 units, the highest among all cities. Meanwhile, Los Angeles recorded N2O levels between 39 and 104 units. Calcutta exhibited slightly lower figures, with a maximum of 52 units, while Beijing had the lowest N2O concentration, with levels fluctuating from 14 to 80 units, indicating relatively better air quality.
Get your personalised IELTS Essay Feedback from a former examiner
Download IELTS eBooks, get everything you need to achieve a high band score