Theland the world ie Earth has and has always had a limited life span.
In the case of Earth the end will come in around 3 Billion years when our Sun (which is just an ordinary star like trillions of others) will have used up all of it's, huge though limited, stock of Hydrogen fuel and start on the Red Giant phase of it's life. When this happens the Sun will expand and Mercury, Venus and Earth will actually be inside the Sun. Many millions of years before this the expanding Sun will have burnt the Earth to a blackened cinder.
This has NOTHING to do with God , it is 100% due to the laws of Physics and Chemistry. We know it will happen because we have seen it happen to millions of other stars like the Sun.
Eventually the same will have happened to all the stars in all the galaxies in the entire universe and the universe itself will have ceased to exist. Google it it is called 'Heat Death of the Universe'
Not one iota of this process was or will be due to the presence or absence of any form of God or Deity. It is 100% due to the rules of science and nature.