Humanities
We should not build cities on Antarctica because of the ice melting and maybe antarctica will get polluted and that is pretty much the only place that is not polluted People might think that it is a good idea because they don't
Think of the consequences if they do it like how much of the free
Land they will cover and maybe the ice will crack and break and the buildings will sink.
Ships might crash and the oil will leak so it will be a long time till
People can come outside and go any where and all the money it will take to build and they will have to make thing for people to go there and have a good time
There are more things than can bee included in the good idea section like there will be more room the world for living  there is a bad idea as well if there are people they will have wars and armys there so some of the