Across
- 1. when there is too much water in the river
- 4. buildings that produce a lot of pollution
- 6. to use something again
- 7. no rain for a long time
- 9. bad chemicals in the air and water
- 11. tropical forests
- 13. rain that contains harmful chemicals
- 14. fog + smoke
Down
- 2. a layer of gases that protects the Earth
- 3. coal, oil and gas
- 5. cutting down a forest
- 8. tropical storm
- 10. ice in the Arctic and Antarctica
- 12. trash or garbage