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1. We must not unnecessarily tear up blank pages of a notebook.
2. We must not discard notebooks until every blank page has been utilised.
3. We can use the blank sides of advertising pamphlets, the inner side of postal envelopes, etc. to take notes.
4. We should try to use a pencil to take notes whenever possible so that the paper can be reused.
5. We must try to recycle discarded paper as much as possible.