Across
- 2. To result in or cause something to happen.
- 5. Systemshowing how each creature depends on another for food.
- 8. Substances that make air or water dirty.
- 9. Animals or plants that may soon disappear.
- 13. To destroy or eliminate completely.
- 15. Long period without rain.
- 16. Waste that comes from nuclear power.
Down
- 1. A source of energy that replaces fossil fuels.
- 3. Materials that have been processed to be used again.
- 4. Too many fish are caught from the sea.
- 5. Natural flow of water that covers land after heavy rain.
- 6. To reduce the amount of something.
- 7. Cutting down large areas of trees.
- 9. Gas or smoke from vehicles.
- 10. Alternative energy that comes from plants.
- 11. Changein the Earth’s temperature and weather patterns.
- 12. Produced without chemicals or pesticides.
- 14. out To stop existing completely (phrasal verb).