15.1 Natural world puzzle

3. relating to trade, industry, and money
4. resources are natural ones such as wind, water, and sunlight which are always available
6. a long period when there is little or no rain
7. a body of water usually smaller than a lake
8. relating to chemistry
10. a stream of water that flows from a high place, often to a pool below
16. to increase, or move to cover a larger area or affect a larger number of people
19. a small river
20. strong, unpleasant, and often dangerous gas or smoke
21. a substance that pollutes water, air, etc.
22. to do or use less of something (2 words)
23. having extremely bad consequences and effects

1. containing poison
2. a fuel such as coal or oil that is obtained from under the ground (2 words)
5. not using a lot of money, fuel
9. an artificial river built for boats to travel along or to take water where it is needed
11. a part of a river where the current is fast and the surface is usually broken by obstructions (usually used in plural but singular or plural in construction)
12. a large area of water that has land all around it
13. an artificial lake where water is stored before it goes to people's houses
14. extreme suffering or death, caused by lack of food
15. not wanted
17. a strong wall built across a river to stop the water and make a lake
18. a rising and overflowing of a body of water especially onto normally dry land