I think that even though environmentalists and Christians have a different approach they want the same thing when it comes to the environment. They both want to take care of God's creation. And in the end God is going to decided when it all ends, and nobody can change that. But for now Christians have to take care of his creation and act responsible.
But not to extremes as is being done now for the past few decades.
God will give us, after perhaps temporarily healing this one during the millennium reign a brand new earth, this old earth will cease to exist, it is described as being pushed away, fleeing away from the presence of God, and also like God changing his clothes, as in this earth will be discarded into the trash bin, it will cease to exist, it will be converted to energy I suppose, with Peter saying it will all burn up even the elements it is made from.
The new earth will all be new, nothing of the old one will be recycled.
Even Christians having their new spirits in Christ will get new bodies.
The reason for the the all newness theme, is the old heavens and earth are tainted having had the presence of evil things at work in them due to the work of Satan and the fall in Eden.
Hebrews 1
10 And:
“You, Lord, in the beginning laid the foundation of the earth,
And the heavens are the work of Your hands.
11 They will perish, but You remain;
And they will all grow old like a garment;
12 Like a cloak You will fold them up,
And they will be changed.
But You are the same,
And Your years will not fail.”
2 Peter 3:12-14
12 looking for and hastening the coming of the day of God, because of which the heavens will be dissolved, being on fire, and the elements will melt with fervent heat? 13 Nevertheless we, according to His promise, look for new heavens and a new earth in which righteousness dwells.
Revelation 20
The Great White Throne Judgment
11 Then I saw a great white throne and Him who sat on it, from whose face the earth and the heaven fled away. And there was found no place for them. 12 And I saw the dead, small and great, standing before God, and books were opened. And another book was opened, which is
the Book of Life. And the dead were judged according to their works, by the things which were written in the books. 13 The sea gave up the dead who were in it, and Death and Hades delivered up the dead who were in them. And they were judged, each one according to his works. 14 Then Death and Hades were cast into the lake of fire. This is the second death. 15 And anyone not found written in the Book of Life was cast into the lake of fire.
Revelation 21
All Things Made New
1 Now I saw a new heaven and a new earth, for the first heaven and the first earth had passed away. Also there was no more sea. 2 Then I, John, saw the holy city, New Jerusalem, coming down out of heaven from God, prepared as a bride adorned for her husband. 3 And I heard a loud voice from heaven saying, “Behold, the tabernacle of God
is with men, and He will dwell with them, and they shall be His people. God Himself will be with them
and be their God. 4 And God will wipe away every tear from their eyes; there shall be no more death, nor sorrow, nor crying. There shall be no more pain, for the former things have passed away.”
5 Then He who sat on the throne said, “Behold, I make all things new.” And He said to me, “Write, for these words are true and faithful.”
6 And He said to me, “It is done! I am the Alpha and the Omega, the Beginning and the End. I will give of the fountain of the water of life freely to him who thirsts. 7 He who overcomes shall inherit all things, and I will be his God and he shall be My son. 8 But the cowardly, unbelieving, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars shall have their part in the lake which burns with fire and brimstone, which is the second death.”