In a certain medical shop, the shopkeeper uses a strategy of using the pages of old newspapers to make envelopes for medicine. Which among the 3 R's strategies was implemented by him?
Reuse
If a new product is made from an old used product by synthesising, then the process is termed as recycle. Here, the shopkeeper is making paper envelopes out of old newspapers that too without synthesising them. So he is just adopting the strategy of reuse.