The world is urbanizing fast. In less than a century more than 1 billion people have been urbanized. That translates into the fact that more than half of the world’s population is already living in cities. Experts forecast that very soon Africa will become one of the most urbanized continents. However, almost 70% of world’s urban population is living in the cities where governments are struggling to provide basic services like sanitation, schools, hospitals, and adequate clean water.