The Issues With Underwater Metropolitan Areas

[Hibou]

Didn't you read what I said about ROMAN concrete?  Also, if that's not the answer, then what material is?

What exactly about ROMAN concrete makes you think that it's going to be magically superior for underwater use, and not subject to the same sorts of issues any other concrete is?

Maybe you could try using Google to find your answers, instead of being rude about people not answering everything for you.

[Llum]

Didn't you read what I said about ROMAN concrete?  Also, if that's not the answer, then what material is?

So where are all the ROMAN underwater cities then?

[sparkletwist]

This thread has become unproductive. Closing it.

JohnWDaileyGLE, feel free to start a new thread when you're ready to engage with the community, instead of posting rather confrontational one-line replies without addressing any of the points people have made in their attempts to be helpful.