Listening Test 1 Part 4.2

Questions 33-40
Complete the notes below.
Write ONE WORD AND/OR A NUMBER for each answer.

The Underground House

- Built in the earth, with two floors
- The south-facing side was constructed of two layers of 33
- Photovoltaic tiles were attached
- A layer of foam was used to improve the 34 of the building
Special features
- To increase the light, the building has many internal mirrors and 35
- In future, the house may produce more 36 than it needs

- Recycled wood was used for the 37 of the house
- The system for processing domestic 38 is organic
Environmental issues
- The use of large quantities of 39 in construction was environmentally harmful
- But the house will have paid its 'environmental debt' within 40

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