Across
- 3. the oil spills
- 5. the aluminum cans
- 7. the animals
- 10. the paper
- 11. the plastic cans
- 14. the windmills
- 15. a factory
- 17. the nuclear energy
Down
- 1. a hybrid car
- 2. to heat up
- 4. to recycle
- 6. the respiratory problems
- 8. the solar panels
- 9. the pollution
- 12. the wild animal reserves
- 13. an electric car
- 16. the greenhouse effect