Which city has already subsided below sea level?

Name: Which city has already subsided below sea level?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

New Orleans is the only city listed that has already subsided below sea level. The majority of the city is now below sea level and relies on levees and pumps to prevent flooding. While the other cities listed are at risk of future sea level rise and potential subsidence, they have not yet reached that point.

Which City Has Already Subsided Below Sea Level