This was an admittedly difficult poll — and it appears that most of you did take it, as we had suggested, without resorting to Google.
Here are the 15 largest urban areas in the world:
The world is changing rapidly. In less than 10 years, India will surpass China as the most populous country in the world, and Nigeria will pass the United States as the third largest.
DailyChatter exists to help you know the world better. We hope surveys like this make a small contribution.