Disclaimer - I have left behind all the JW and other religious speculation on this and am now a non-religious scientific thinker on the subject.
So, for me - Earth is the planet we live on. Both Earth and all of us have a finite lifetime - and it is up to us NOW what we do with both.
But, as a question for exJWs like myself: Much is made in the JW theology of an eternal "paradise" Earth. Putting aside how much scientific nonsense that may be:
Does the Bible specifically say that there is such a thing as an eternal physical paradise on this planet Earth? I cannot think of anyplace it really does - the witness teaching on this is by a combination of this and that supposition and assumption if I remember it correctly. The versus used could really be more readily understood as something symbolic or heavenly.
Anybody else have something to post on this?