Across
- 4. Power used for light, heat and machines
- 7. A very large area of salt water
- 10. The natural world, including plants, animals and landscapes
- 11. Things that people throw away because they do not want them anymore
Down
- 1. A car, bus or truck is a type of this
- 2. Related to the sea and the animals or plants living in it
- 3. A problem or an important topic that people discuss
- 5. Unwanted or unpleasant sound
- 6. To use waste materials again instead of throwing them away
- 8. Existing in or related to nature
- 9. The planet where we live