It seems implausible that Adelaide would overtake Auckland between now and then, when Auckland is currently growing faster than any of the big 5 Australian cities
A full three percent of Chicago's population moved out of the city from 2020-2022. Houston is projected to overtake their third biggest in the country spot within a decade. Yet somehow Chicago makes the list but not Houston? I'm a little doubtful of how the source concluded this.
If 88 million people live in any African city in 2100 I will chew my own foot. This is like a CEO projecting the company will be making £10tn in 20 years because revenue doubled last year. Dar Es Salaam is projected to have more population in 2100 than the entire country of Tanzania does right now. Fun quiz though!