With over 2 million visitors flocking in every year, Brazil's second largest city, Rio de Janeiro is already the most popular tourist destination in the Southern Hemisphere. Now, with the city hosting the final game of the 2014 World Soccer and the 2016 Summer Olympics, things can only get worse. While most cities prepare for events like this by adding more hotel rooms or police force, Rio is etching bar codes into the city's iconic black and white mosaic sidewalks and, its not because they are trying to sell them to the tourists either!
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