You will hear part of a lecture about an architect called Josh Keysall, who became famous for designing environmentally friendly houses known as Earthpods. For questions 1-9, complete the sentences with a word or short phrase.
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Soon after graduating, Keysall thought up a successful way of providing 1 in the construction of buildings. In his first Earthpod, Keysall used 2 instead of bricks to make the walls. The speaker says the Earthpods are passive solar buildings with walls which are like 3 in the way they function. Keysall uses the term 4 to describe the independence of his Earthpods from conventional energy sources. An Earthpod originally used as a 5 in Switzerland was specially adapted for the climate. In Belgium, safety regulations prevented Keysall from using 6 to construct an Earthpod. In the UK, an Earthpod project involved the protection of some 7 living in the area. Following complaints about defects such as 8, Keysall lost his professional status. A film called 9 has been made about Keysall's life, work and legal battles.