Across
- 1. having little or no rain.
- 7. a resource that can not be replace as fast as it is used.
- 8. a shortage of something.
- 9. people who travel from place to place to find fresh pasture for their livestock.
- 10. a liquid mixture of hydrocarbons.
Down
- 2. the structures and facilities.
- 3. removing salt and minerals from fresh or salt water.
- 4. a body of permeable rock that can contain or transit groundwater.
- 5. the Organization of Petroleum Exporting Countries.
- 6. the method in which water is supplied to plants at regular intervals.