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Pop. of Karachi, Pakistan (15 million people) is 500 x Number of seats in Lord's Cricket Ground (30,000 )
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Pop. of Xi'an, China (4.47 million people)
If this was a standard unit ...
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.
Click here to learn more about it.
Click here for Podcast: Andrew Elliott interviewed for New Books Network.