Since the sea levels are supposed to rise something like 10 feet in less than 100 years I would propose the possibility that building a society below sea level is unsustainable.
Since all the money, time, resources, energy, labor could be used for literally anything else on a place that is not below sea level.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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