Across
- 2. A large amount of water covering an area that is usually dry.
- 4. official rules that say what people are allowed or not allowed to do
- 6. Not existing anymore.
- 8. Material that people throw away.
- 10. To collect and treat rubbish to produce useful materials that can be used again.
Down
- 1. Things that make water, ground and air unclean.
- 3. on standby To not switch an appliance off completely so it's ready to be used at any time
- 5. To stop something from being wasted.
- 7. To fill up an empty battery again.
- 9. Change from solid to liquid