Yes, I got my answer out of the Bible. If the earth was destroyed, then Noah couldn't have floated around in the ark. Therefore the earth wasn't destroyed, only the inhabitants. Therefore "earth" refers to living beings and not "kosmos".Sorry to bud in, but what do you mean, no? Did you read the Bible to get this answer? Also, we are not in a new heaven and a new earth. This earth will burn up first.
I believe the New Heaven and New Earth refer to the New Covenant, therefore, yes we live in the New Heaven and New Earth. See Dr. Bob's thread about the earth being destroyed to see scholars in the past who shared this view. C.H. Spurgeon being the most recognizable.