Question

rag pickers act as saviours for municipal coroporation.elaborate on their role in waste management

Answer 1

Rag-pickers, who contribute to solid waste management to some extent are the people who rummage through garbage bins to pick out 'rags' for their livelihood. These rag-pickers usually collect the materials that have good re-sale value as these materials are mostly recycled or reused. 

That's why it is call that they are saviours of municipal corporation.