Across
- 2. converts crude oil into useful products
- 3. When winds evaporate the moisture in the soil, salts with chemicals in them remain, creating this
- 5. area in a desert where vegetation is found
- 6. small pipes drip water above ground to conserve water
- 7. removes salt from water
Down
- 1. petrol that has not been processed
- 2. desert
- 4. water from underground aquifers