It's a plan for reducing the levels of plastic waste for the safety of the environment.
The 3 R's of waste management is one of the ways to put the plan of keeping much material out of the landfill (site for the disposal of waste material) into action.
The term 'reduce' means creating less waste, 'recycle' means changing discarded materials into new products and 'reuse' means finding a new use for unwanted items to save the environment.
Final answer: Three R's include reduce, recycle and reuse.