(I know, Earth Day is April 22nd, not 21st, but let's get ahead of things, for once.)
Using the ASV, which is public domain, I have listed some of those occurrences, categorized. I have also quoted some verses which I believe are related to environmental stewardship. (Bold added)
The word, "earth," occurs in scripture nearly 1000 times.
God, including God the Son, is creator:
Gen 1:1 In the beginning God created the heavens and the earth.
Gen 1:31 And God saw everything that he had made, and, behold, it was very good. And there was evening and there was morning, the sixth day.
Isa 45:12 I have made the earth, and created man upon it: I, even my hands, have stretched out the heavens; and all their host have I commanded.
Jhn 1:1 In the beginning was the Word, and the Word was with God, and the Word was God. Jhn 1:2 The same was in the beginning with God. Jhn 1:3 All things were made through him; and without him was not anything made that hath been made.
Col 1:16 for in him were all things created, in the heavens and upon the earth, things visible and things invisible, whether thrones or dominions or principalities or powers; all things have been created through him, and unto him; 17 and he is before all things, and in him all things consist.
God is not only creator, but also sustainer:
Psa 65:9 Thou visitest the earth, and waterest it, Thou greatly enrichest it; The river of God is full of water: Thou providest them grain, when thou hast so prepared the earth. 10 Thou waterest its furrows abundantly; Thou settlest the ridges thereof: Thou makest it soft with showers; Thou blessest the springing thereof.
Psa 104:10 He sendeth forth springs into the valleys; They run among the mountains; 11 They give drink to every beast of the field; The wild asses quench their thirst. 12 By them the birds of the heavens have their habitation; They sing among the branches. 13 He watereth the mountains from his chambers: The earth is filled with the fruit of thy works. 14 He causeth the grass to grow for the cattle, And herb for the service of man; That he may bring forth food out of the earth, 15 And wine that maketh glad the heart of man, [And] oil to make his face to shine, And bread that strengtheneth man's heart. 16 The trees of Jehovah are filled [with moisture], The cedars of Lebanon, which he hath planted; 17 Where the birds make their nests: As for the stork, the fir-trees are her house.
Col 1:17 and he is before all things, and in him all things consist.
The earth is God's, not ours:
Job 38:4 Where wast thou when I laid the foundations of the earth? Declare, if thou hast understanding.
Psa 24:1 The earth is Jehovah's, and the fulness thereof; The world, and they that dwell therein. 2 For he hath founded it upon the seas, And established it upon the floods.
Psa 89:11 The heavens are thine, the earth also is thine: The world and the fulness thereof, thou hast founded them.
Psa 95:4 In his hand are the deep places of the earth; The heights of the mountains are his also. 5 The sea is his, and he made it; And his hands formed the dry land.
1Cr 10:26 for the earth is the Lord's, and the fulness thereof.
Humans have responsibility to care for the earth:
Gen 1:26 And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the birds of the heavens, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. 28 And God blessed them: and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it; and have dominion over the fish of the sea, and over the birds of the heavens, and over every living thing that moveth upon the earth.
Isa 45:18 For thus saith Jehovah that created the heavens, the God that formed the earth and made it, that established it and created it not a waste, that formed it to be inhabited: I am Jehovah; and there is none else.
Jer 27:5 I have made the earth, the men and the beasts that are upon the face of the earth, by my great power and by my outstretched arm; and I give it unto whom it seemeth right unto me.
God's creation is unimaginably diverse:
Psa 104:24 O Jehovah, how manifold are thy works! In wisdom hast thou made them all: The earth is full of thy riches. 25 Yonder is the sea, great and wide, Wherein are things creeping innumerable, Both small and great beasts.
God will create a new earth:
Isa 65:17 For, behold, I create new heavens and a new earth; and the former things shall not be remembered, nor come into mind.
Rom 8:21 that the creation itself also shall be delivered from the bondage of corruption into the liberty of the glory of the children of God. Rom 22 For we know that the whole creation groaneth and travaileth in pain together until now.
Rev 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth are passed away; and the sea is no more.