This is in reply to one of your questions in your 4/27 post a much larger new earth in which you stated the following:

"Also, on the current earth, there is almost no oxygen, at the height of 12K furlongs.

So, either the atmosphere will be significantly different, or the new earth much, much larger, with O2 levels normal at that height, or both?

Resurrected people apparently won't have any problem with lower O2 levels, so perhaps on the new earth, people and birds can be up at 12K furlongs, without any problems."

MY REPLY:

If New Jerusalem in an entirely enclosed structure 1500 miles high, the resurrected people inside of it wouldn't need oxygen to survive because they all have immortal bodies that never die, and any humans entering through the gates into the lower ground level of New Jerusalem should have sufficient oxygen to breathe.

The Bible doesn't give us the circumference of the New Earth, but presently the circumference around the equator is 40,075.017 km (24,901.461 miles). Measured passing through the poles, the circumference is 40,007.863 km (24,859.734 miles) according to Earth's circumference - Wikipedia  Considering that 70% of the present Earth's surface is oceans according to All About the Ocean these oceans will become land for people to live on, but there is always the possibility that the New Earth could be larger, and New Jerusalem will only take up a square of land that is 1500 miles long and 1500 miles wide.