In a teaching session on topic of recycle, the teacher asked her students how do they get involved in recycle programme.
Teacher: Ali, how do you play a role in recycling?
Ali: I sort out rubbish according to material category before putting them into designated bins.
Teacher: Muthu, how about you?
Muthu: I help my father to send old newspapers to recycle centre.
Teacher: Peter, and you?
Peter: I recycle stamps.
Teacher: What do you mean?
Peter: I quite often receive letters with uncancelled stamps, so I will soak up those uncancelled stamps from the envelopes to be used as postage for my letters.
