Enterprising Dharavi - first look at one of the world's largest slums. (Thanks to a good guide :D)
This here is a chindi-seller (chindi are the shreds of excess cloth that is cut off while making clothes). Within a small cluster was a shop making denim cloth and another nearby shop making denim jeans. This chindi seller gets his chindi from these shops at Re1 per kg or for free, sorts it by colour and sells it to businesses at Rs 4 per kg. The buyers then recycle it to make pillow stuffings.
Seems like nothing is wasted.