I. Match the word with its meaning.
1. reuse a. to keep something to use in the future
2. reduce b. to give something to someone in exchange for something else
3. recycle c. to use something again
4. save d. to make something start working
5. wrap e. to make something less
6. swap f. to cover something completely in paper
7. turn on g. to make something stop working
8. turn off h. to treat waste materials so that they can be used again