Across
- 1. Often refered as water shortage
- 3. waste from factories and households enters water to cause
- 4. process of removing salt from sea water
- 5. water which is stored in rivers, streams and lakes
- 6. another term of ' saving water '
- 7. filtering water to remove large particles and bacteria
- 10. obtaining water from another country
- 11. arrangement between countries regarding water supply
- 15. water is boiled and the water vapour is collected than condensed into water
- 16. this has further contributed to the problem of water constraint Populationgrowth may cause total supply of water on earth will be shared to more people
- 17. the end product of removing impurities
Down
- 1. this has affected agriculture and led to shortage of food
- 2. forcing water through a membrane to remove small particles
- 8. an area over which rain falls and is collected
- 9. what price and supply of water are responses to rising demands of water
- 12. often used as catchment areas
- 13. a way to encourage the publi to save water
- 14. this is used to create new sources of water
- 18. important for life on earth