Across
- 1. stored in rivers, streams and lakes
- 3. _________ by human activities
- 6. problem of water shortage
- 9. located in ______ regions of the world
- 10. the process of converting sea water into fresh water by removing salt from the sea water
- 11. the process of filtering water to remove larger sized particle and bacteria from the water
Down
- 2. industries
- 4. is produced when impurities are removed from waste water through treatment process
- 5. refers to the careful use of resources to ensure that the wastage is kept to a minimum
- 7. _________for water
- 8. area over which rain falls and is collected