Section 4 recording
Fog Harvesting Technology
You will hear an engineering lecturer giving a talk on the science and process of fog harvesting in arid regions.
One speaker · Australian English · 3:00
In the real test you hear each recording once. Read the questions first, then play it through without pausing.
Go to the questions ↓Questions 1–6
Complete the flow-chart below. Write ONE WORD AND/OR A NUMBER for each answer.
Word limit: ONE WORD AND/OR A NUMBER
Stages in the Fog Harvesting Process
- Initial planning: Site selection along coastal areas.
- Collector nets must be built along a high 1 to capture rising marine fog.
- Mesh fibres are treated with a special 2 to assist water release.
- Tiny moisture particles merge into larger 3 on the mesh surface.
- Water is pulled down by gravity into open 4 underneath the nets.
- Runoff passes through a layer of 5 to eliminate trapped dust and debris.
- Clean water is directed into a covered 6 to stop evaporation.
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