Across
- 2. people pay for water
- 3. effects on water by human activities
- 4. process of water filtration
- 7. the careful use of resources to ensure that wastage is kept to the minimum
- 9. Often appear in the 3R
- 10. clean
Down
- 1. process of converting sea water into fresh water
- 5. the amount of a product which is available to customers
- 6. water shortage
- 8. knowledge,skills and tools that people use to meet their needs