Water Resources

3. using water carefully and not wasting it
5. a way to educate the public to encourage them to save water
7. a type of pond that is built in housing estates to collect rainwater to be chanelled to reservoirs
10. an activity whereby water is temporarily cut off in housing estates
14. paying more money if you use more water
18. a chemical to make water clean and safe for drinking
19. a process of filtering water to remove large sized particles and bacteria from the water
20. this makes water unsafe for drinking

1. also known as recycling water
2. a process whereby water is boiled and the water vapour is collected and condensed into fresh water
4. a wall to separate fresh water from sea water
6. a place where water can be collected
8. an arrangement between two countries to share a water resource
9. the act of buying water from neighbouring countries
11. a method to allow water droplets to form more easily in the air
12. a process whereby sea water is pumped at high pressure through a special membrane which separates small particles from the water
13. what is the problem of water shortage known as?
15. the removal of salt from sea water
16. the lack of rain for a long period of time causes this
17. the use of a advanced technology to produce a very high grade of water