Japan’s Underwater City

Japan’s Underwater City

A Japanese construction firm with a penchant for pie-in-the-sky projects has a new plan: an underwater city. The Shimizu Corporation, a prominent builder that once pitched a space hotel, has proposed an undersea spiral off the coast of Japan that would stretch 2.8 miles (4.5 km) down to the sea floor. A habitable zone would be situated in a massive sphere just below the surface, and energy would be generated by thermal energy conversion and by using micro-organisms to turn carbon dioxide into methane. However, the company says the required technology won’t be ready for another 15 years. More… Discuss

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