In September 2006, the mayor of São Paulo passed the so-called “Clean City Law" that outlawed the use of all outdoor advertisements, including on billboards, transit, and in front of stores. Within a year, 15,000 billboards were taken down and store signs had to be shrunk so as not to violate the new law. Outdoor video screens and ads on buses were stripped. Even pamphleteering in public spaces has been made illegal. Nearly $8 million in fines were issued to cleanse São Paulo of the blight on its landscape. Seven years on, the world's fourth-largest metropolis and South America’s most important city remains free of visual clutter and eye sore that plagues the majority of cities around the world.

When the law was passed, it triggered wild alarm among city businesses and advertisement groups. Critics worried that the advertising ban would entail a revenue loss of $133 million and 20,000 people would lose jobs. Others predicted that the city would look like a bland concrete jungle with the ads removed.

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