Many people believe that this planet will be destroyed, and that God will create a new planet to put there the people he saved from the old planet Earth ... kind of EARTH2

.
Where does the Bible teach that?
Jehovah's Witnesses know that the phrases "new heavens and new earth" and "destruction of the world" do not mean that the planet will be destroyed.
When Jehovah promised "new heavens and a new earth" to the Israelites, he was not saying that he was going to destroy the land where they lived, but that he was going to make it rest the sabbath rests that they had not given it with their bad behavior, but then, later, he would inhabit it with new population and with a new government (new heavens and new earth)...
Is. 65:
17 For look! I am creating
new heavens and a new earth;
And the former things will not be called to mind,
Nor will they come up into the heart.
18 So exult and be joyful forever in what I am creating.
For look! I am creating Jerusalem a cause for joy
And her people a cause for exultation.
That was fulfilled after 70 years of exile in Babylon. But the land was never destroyed; but they came back to it.
2 Chorn. 36:20 He carried off captive to Babylon those who escaped the sword, and they became servants to him and his sons until the kingdom of Persia began to reign,
21 to fulfill Jehovah’s word spoken by Jeremiah, until the land had paid off its sabbaths. All the days it lay desolate it kept sabbath, to fulfill 70 years.
About the "destruction of this world", Peter said:
2 Pet. 2:4 Certainly if God did not hold back from punishing the angels that sinned, but, by throwing them into Tarʹta·rus, delivered them to pits of dense darkness to be reserved for judgment;
5 and
he did not hold back from punishing an ancient world, but kept Noah, a preacher of righteousness, safe with seven others when he brought a deluge
upon a world of ungodly people
... 3:
5 For, according to their wish, this fact escapes their notice, that
there were heavens from of old and an earth standing compactly out of water and in the midst of water by the word of God;
6 and by those [means]
the world of that time suffered destruction when it was deluged with water.
7 But
by the same word the heavens and the earth that are now are stored up for fire and are being reserved to the day of judgment and of
destruction of the ungodly men.
So although the planet suffers some effects, in reality God's punishment is on the wicked men, while he protects the righteous so that they survive. If you were the owner of a house, and the tenants you rent it to destroy it, what do you do? Do you destroy the house, or do you expel the tenants and repair the house to rent it out to better people?
Hasn't the earth been fixed by the laws that God put on it, every time that man has ruined it? How is it that the Bible says that God is going to ruin the people who are ruining the planet and humanity, and at the same time he himself is going to finish destroying it?
Rev. 11:
18 But the nations became wrathful, and your own wrath came, and the appointed time came for the dead to be judged and to reward your slaves the prophets and the holy ones and those fearing your name, the small and the great, and
to bring to ruin those ruining the earth.
Meditate on the Scriptures and use logic from what they say. There are many people who cannot reason correctly... but if you, the reader, can, do not let someone who does not reason properly tell you what to believe.
