Man and Nature

2. a large amount of water covering an area that is usually dry
5. a very big fire that spreads quickly and burns natural areas like woods, forests and grassland
6. the fact of a country or city having too many people living in it
7. catching too many fish in an area of the sea, so that there are not many fish left there
9. the process or fact of making a substance or place dirty or no longer pure by adding a substance that is dangerous or carries disease
12. a situation in which a plant, an animal, a way of life, etc. stops existing
14. not completely necessary
15. the process by which the surface of something is gradually destroyed through the action of wind, rain, etc.
16. the change or process of changing from a solid substance to a liquid
18. a sudden, violent shaking of the earth’s surface
19. any material that produces heat or power, usually when it is burnt

1. damage caused to water, air, etc. by harmful substances or waste
3. the cutting down of trees in a large area, or the destruction of forests by people
4. a violent storm with very strong winds, especially in the western Atlantic Ocean
8. the act of putting somebody/something in a situation in which they could be harmed or damaged
10. a long period of time when there is little or no rain
11. the act of destroying something; the process of being destroyed
13. the vehicles that are on a road at a particular time
17. used water and waste substances that are produced by human bodies, that are carried away from houses and factories through special pipes