Question

Why do slums like seemapuri mushroom around big cities

Answer 1

Not all of them like mushrooms of seemapuri. Some of them like them because it is very cheap.

Answer 2

"Slums like Seemapuri mushroom around big cities" because of the need for food as it the most important form of staple food and the source of energy.

The only source of food was bought with the help of ration cards and their needs were satisfied. Rag pickers were considered an art which helped in buying food.  

The homes in those areas were mud structures without proper roofing or drinking water.