Theory:

Since non-biodegradable wastes cannot be decomposed, the disposal poses a big problem and a threat to the environment. The non-biodegradable wastes can be managed by following 3 R's - Reduce, Reuse, and Recycle.
Reduce
The use of disposable non-biodegradable materials like plastic bags and disposable napkins are increasing in our day to day life. The use of non-biodegradable materials must be reduced so that amount of waste generated can be reduced. The use of disposable items should be reduced as they have hazardous effect during the disposal of it.
Reuse
It is always better to reuse the materials wherever possible.
Example:
1. Small jars, containers, bottles, etc. can be used for storing some other kitchen stuff.
 
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2. Prefer the use of glass bottles rather than metal as glass materials can be refilled and reused.
 
3. Old clothes can be converted into door mat, cushion cover, handkerchief, mask etc.
 
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4. Old chart papers can be converted to files.
Recycle
Process by which waste materials are converted to useful new products is called recycling.
Waste or used product of glass, metal, paper, and plastic were collected, separated and recycled to make new products. products.
Example:
1. Old newspapers, books, magazines, notebooks are recycled by sending them to paper mills where they reprocess to produce cardboard or recycled paper.
 
2. Bucket, bottle, toys, bag, pen, and other materials made from plastic is sent to plastic processing factories, where they can be remolded to make new plastic items..
 
3. Useless and broken glass items can be reprocessed in making new glass items.
 
4. Waste metal items made of iron and aluminium are sent to metal industries, where it is melted and can be recycled.
Role of Ragpickers and Kabadiwalas in the management of wastes:
 
Ragpickers collect the waste from open dumping areas and supply it to the recycling units. Thus, they earn a living for themselves and also clean the environment.
 
Kabadiwalas collect wastes like glass items, metal items, plastic, old newspapers, etc., and sent it to the recycling units. Thus, they help in the reduction of the quantity of waste generated.
 
Important!
Papier-mâchè is a paste that is made from paper pulp, clay, and rice husk. It is used for molding into boxes, trays, etc., which again aids in recycling of paper.