Across
- 4. reuse, recycle
- 8. energy sources that won't run out
- 9. to use something again
- 11. used to gather energy from wind (you might see them in the countryside)
- 12. a mix of fog and smoke, or a layer of polluted air
- 13. a common type of fossil fuel
Down
- 1. type of polluted rain from factories and other industry
- 2. we should all do this with paper glass and plastic
- 3. when there are not many left, animals are said to be this
- 5. source of energy from the sun
- 6. deforestation is when lots of these are cut down
- 7. the planet we are trying to save
- 10. a mixture that consists mostly of decayed organic matter and is used for fertilizing land