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