REAL-LIFE SKILLS READING CHARTS CITIES WITH THE WORST AIR QUALITY IN THE WORLD 7 Look at the chart below and answer the questions: Which city has the worst air quality? How many cities are from Africa? And from Asia? Are there any European cities in the graph? If not, what is the reason according to you? What does the air quality of a city depend on? Have you learnt anything from the chart which surprises you? What is the main conclusion you can draw from this chart? Choose from the following: a. Nigeria has three cities in this chart. b. The most polluted cities are in Central Asia. c. In the Middle East there is no problem of pollution. d. China has the record of polluted cities. TOP 20 Most Polluted Cities in the World PM10 particulate concentration, micrograms per cm