Dharavi in Mumbai is the largest slum in India, second to Orangi Township in Karachi, which is the largest slum in Asia and forth to the largest slum in the world in Mexico. With an area of mere 2.1 km square, Dharavi is a hub for several commercial activities and home to a whopping population of 700,000 to 10,00,000. However, it is not because of the slum's extreme poverty that the place has got recognition all over the world. People over at Dharavi work tirelessly to make sure the city of Mumbai functions effectively. If you were to remove Dharavi from Mumbai, the city would completely collapse. And why would it not? Dharavi houses lanes and lanes of commercial units like waste segregation, fabric dyeing, leather production, and many more. To give you a perspective, there are about 15,000 single room factories and 7000 industries, all in an area of just over 2 km square.