REDUCE
- refers to the strategies in reducing the volume of solid waste generated at source. (Synonyms: decrease (v.); downgrade (v.); Antonym: increase)

REUSE
- refers to the recovery of materials intended to be used again either for the same or different purpose without altering their physical and chemical characteristic. (Synonym: use again (v.); Antonym: discard)

RECYCLE
- refers to the process by which solid waste materials are transformed into new products or used as raw materials for the production of other goods or services (Synonym: reprocess (v.); salvage (v.); recover (v.))