Across
- 4. a mountain with a large circular hole at the top through which lava gases, steam and dust are or have been forced out.
- 6. number and variety of plant and animal species in a particular area.
- 8. resources things such as minerals, forests, coal, etc. which exist in a place and can be used by people.
- 9. strong, unpleasant and sometimes dangerour gas; smoke.
- 10. an extremely large wave caused by movement of the earth under the sea, often caused by an earthquake.
Down
- 1. damage caused to water, air or soil by harmful substances or waste.
- 2. the cutting down of trees in a large area.
- 3. monoxide poisonous gas.
- 5. general weather conditiones useally found in a particular place.
- 7. unwanted matter or material of any type; trash.