India, May 24 -- Change is afoot in the solid waste management system of one of the world's most populous cities. From the type of waste that will be picked up from homes, to how and who will collect it, where it will go, what will become of it, and how much residents will pay for the waste collection, the pot of garbage is being stirred.

Mumbai produces a mammoth 7,300 metric tonnes of waste every day. With some exceptions, all this trash travels to dumping grounds in Kanjurmarg and Deonar.

Propelled in different directions by centrally prescribed waste management rules, mounting expenditure and liabilities, an unmatched scarcity of space due to an ever-growing population, and the very persistent nature of garbage, the Brihanmumbai Mun...