Across
- 2. use something again
- 5. cutting many trees
- 8. gases surrounding the Earth or other planet
- 10. throwing out useful things
- 11. thing that we throw out and no one uses them
- 12. polluted air
- 14. energy from the sun
Down
- 1. wild animals of the region
- 3. animals that are at the risk of the extinction
- 4. polluted air that factory produce
- 6. the usual weather in specific area
- 7. rubbish left in a public place
- 9. using water to making energy
- 13. when something solid changes to liquid