Sao Paulo crowded train station 1Paulo Whitaker/ReutersThe Se Station, located in Sao Paulo, Brazil, sees approximately
 1.5 million people a day.
For better or worse, humans are trading in grass and farms
 for concrete and skyscrapers.
Nearly 80% of people in developed countries live in urban areas,
 and why not? City life is chock-full of opportunities you could
 never find in the suburbs or countryside, part of the reason
 that 250 million people
 are moving into Chinese cities alone
But as a city grows, so does its dependence on things like buses
 and high-speed rail — making for rush hours that will make 
you grateful for your relatively sane commute.

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