There are several key points made in the document:
1) Historically, textile mills in Mumbai had ponds within their premises to help fight fires, but many have disappeared as the mills closed and the land was redeveloped.
2) An artist photographed and documented the remaining mill ponds in the early 1990s, finding a surprising biodiversity, but had difficulty convincing officials they were in Mumbai.
3) While a few mill ponds still retain natural beauty, others now lie neglected as the surrounding lands have been redeveloped, and some are now completely built over.
4) The disappearance of these mill ponds represents the loss of natural spaces as cities prioritize development over environmental protection.