FACTS

Could you name the largest cities in the world by population?  Most but not all, I would guess. It's difficult to be exact because some cities don't have a good way of counting the residents.  It is also difficult because you can't tell where some cities end and another begins.  Just in case you were wondering, here are what most people consider the most populated.  The order varies by how you are counting but this is pretty close.  The list starts with the most populated.

  Tokyo, Japan
  Delhi, India
  Shanghai, China
  Mumbai, India
  Beijing, China
  Dhaka, Bangladesh
  Sao Paulo, Brazil
  Karachi, Pakistan
  Osaka, Japan
  Cairo, Egypt
  Lagos, Nigeria
  Mexico City, Mexico
  New York City, USA

It was the mention of the size of Karachi, Pakistan in a movie I was watching that sparked my interest.  I never heard of the place.  It sits on the Sea of Arabia - parts of it look like a resort; parts like you would expect with overpopulation.

Notice where these cities are.  In fifty years, the world will certainly be a different place.
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