請回答下列第46題至第50題 Thought to have been constructed since the 1930s, Perth Blue Boat House has been rebuilt and repaired on a numberof occasions and has had lots of uses. For decades, locals drove past this bright blue wooden house several times a daywithout noticing. But recently,   46   its popularity on Instagram, the boathouse has become a well-known touristattraction. There has been a(n)   47   of visitors to this area, with tour buses and self-driven visitors stopping here forpictures. Popularity,   48   , can come with problems. The closest public toilet is 1.5 miles away. Tourists go to anearby restaurant to use the toilets. The owner   49   that some had been rude, disruptive and even verballyabusive.   50   this problem, Perth’s city council has decided to build its first solar-powered toilet. It will reportedlycost US$278,000 to install and an additional $14,000 per year for maintenance.
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