18 окт 2030 г. - Underwater City

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A Japanese construction firm, the Shimizu Corporation, in concert with many research firms and government agencies, has plans for an underwater city of 5,000 people called the "ocean spiral" 4.5 km (2.8 mi) off the Japanese coast, which will consist of a giant sphere containing homes and businesses situated just below the surface, held up by a 14 km (9 mi) spiral descending to the seabed, where there will be a submarine port and a factory powering the city by using microorganisms that turn carbon dioxide into methane. The Shimizu Corporation plans to start construction in 2025

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