Table: Number of global megacities at four dates, showing how many cities had populations of 10 million or more. This is illustrative data for practice.
| Year | Number of megacities |
|---|
| 1990 | 10 |
| 2000 | 15 |
| 2010 | 21 |
| 2020 | 33 |
(a)Using the table, state which decade saw the largest absolute increase in the number of megacities.(1)
(b)Calculate the absolute increase in the number of megacities between 1990 and 2020.(2)
(c)Describe the overall pattern shown by the table and suggest one reason for this pattern at the global scale.(3)
(d)Suggest one limitation of using the count of megacities to understand global urban change.(2)
(Total for Question 8 is 8 marks)