Across
- 4. a member of a people having no permanent abode, and travel from place to place to find fresh pasture for their livestock.
- 5. Comes from the surface and ground sources.
- 6. the process of removing salt from seawater.
- 7. the supply of water to land or crops to help growth.
- 8. the contamination of water sources by substances which make the water unusable.
- 10. Transportation systems, communication networks, sewage, water, and school systems.
Down
- 1. Distribution of water and sanitation is unequal.
- 2. sources that will run out or will not be replenished in our lifetimes.
- 3. the state of being scarce or in short supply.
- 9. a body of permeable rock which can contain or transmit groundwater.