Well, there's nothing wrong with this earth, why would Jehovah destroy it? Or do you doubt His ability to restore the damage done over the last few hundred years? What of his promises?
Gen. 8: 21 And Jehovah began to smell a restful odor, and so Jehovah said in his heart: “Never again shall I call down evil upon the ground on man’s account, because the inclination of the heart of man is bad from his youth up; and never again shall I deal every living thing a blow just as I have done. 22 For all the days the earth continues, seed sowing and harvest, and cold and heat, and summer and winter, and day and night, will never cease.”
Isa. 45:18: “This is what Jehovah has said, the Creator of the heavens, He the true God, the Former of the earth and the Maker of it, He the One who firmly established it, who did not create it simply for nothing, who formed it even to be inhabited: ‘I am Jehovah, and there is no one else.’”
Prov. 2:21, 22, KJ: “The upright shall dwell in the land [“on earth,” NE], and the perfect [“blameless men,” NE] shall remain in it. But the wicked shall be cut off from the earth, and the transgressors shall be rooted out of it.” (Notice that it does not say the blameless will return to the earth but that they “shall remain in it.”)
Matt. 6:10: “Let your kingdom come. Let your will take place, as in heaven, also upon earth.”
Ps. 37:29: “The righteous themselves will possess the earth, and they will reside forever upon it.”
So, with just those few verses anyone can see that God promises this earth will stand, so, since we know that the Bible does not contradict itself, the phrase "new heaven and a new earth" must mean something NOT literal. Any reasonable person would agree.
If these texts (2 Peter 3:7, 10 and Revelation 21:1) mean that the literal planet Earth is to be consumed by fire, then the literal heavens (the stars and other heavenly bodies) are also to be destroyed by fire. Such a literal view, however, conflicts with the assurance contained in such texts as Matthew 6:10, Psalm 37:29 and 104:5, also Proverbs 2:21, 22. Furthermore, what effect would fire have on the already intensely hot sun and stars? So the term “earth” in the above-quoted texts must be understood in a different sense.
At Genesis 11:1, First Kings 2:1, 2, First Chronicles 16:31, Psalm 96:1, etc., the term “earth” is used in a figurative sense, referring to mankind, to human society. Might that be the case at 2 Peter 3:7, 10 and Revelation 21:1?
Note that, in the context, at 2 Peter 3:5, 6 (also 2:5, 9), a parallel is drawn with the Flood of Noah’s day, in which wicked human society was destroyed, but Noah and his household, as well as the globe itself, were preserved. Likewise, at 2 Peter 3:7 it says that the ones to be destroyed are “ungodly men.” The view that “the earth” here refers to wicked human society fully agrees with the rest of the Bible, as is illustrated by the texts cited above. It is that symbolic “earth,” or wicked human society, that is “discovered”; that is, Jehovah will sear away as by fire all disguise, exposing the wickedness of ungodly human society and showing it to be worthy of complete destruction. That wicked society of humans is also “the first earth,” referred to at Revelation 21:1 (KJ).
Consistently, Jesus’ expression at Luke 21:33 (“heaven and earth will pass away, but . . . ”) must be understood in the light of the parallel statement at Luke 16:17 (“it is easier for heaven and earth to pass away than . . . ”), both of which simply emphasize the impossibility of the situations presented.—See also Matthew 5:18.
See, that's really fairly easy to grasp, isn't it? Also, it harmonizes with the rest of Scripture and with Gods purposes.