200 Largest Cities in 2100

Good Quiz, but please list the source and the population of the Cities aswell. There are two Dots in Egypt without a City-Name and one in Brazil (Porto Alegre). And btw what city is there in Brazil that's just called Santiago?

Why isnt porto alegre in here when it is on the map? Also, there's another city in brazil called Santiago, what are your sources?

Of course I'm no population scientist but this scenario seems pretty unrealistic to me, like if someone just took todays growth rate and extrapolated them out to infinity.

Looking at Tokyo with about 40 mio people it seems like the predict several 200+ mio cities in Africa. People are just gonna emigrate and the birth rate is gonna slow down with industrialisation

Man, I don't even know where to begin with this one. Valiant effort I suppose, but there's a lot wrong here (ignoring the obviously dubious statistics the quiz is based on).

1. Decide if you are using metro or city proper. Don't be random with it. You clearly used metro for American cities at least, but not other countries.

2. Clean up the SVG. Having really huge dots and really tiny dots makes the quiz a struggle to even see what you're looking at. Some dots are badly misplaced. there's something weird going on with a "Santiago" in Rio Grande do Sul, and near-perfect overlap in some instances (see Mexico).

3. Type-ins. Mostly seemed fine, but "Seam Reab" for Siem Reap is egregious (egregious that someone thinks it will be a top 200 city in 75 years too, but I digress)

4. Do something with the answer columns, don't leave them an unsorted mess. Alphabetize, go by country, or better yet, match the theme of the quiz and sort by population.

Adding populations would improve this dramatically..