Wearing it out is a sign that it was enjoyed.

 Of old you laid the foundation of the earth, and the heavens are the work of your hands. They will perish, but you will remain; they will all wear out like a garment. You will change them like a robe, and they will pass away, but you are the same, and your years have no end. The children of your servants shall dwell secure; their offspring shall be established before you.

Psalm 102:25-28 (ESV)
God alone does not change. All other created things, which is all other things, will. The earth, as mentioned here, will wear out like a garment.

Those who want to worship the earth rather than care for it are silly. When I was a boy, I remember going into some homes where they had bought nice furniture. They wanted it to be cared for so much that they did not allow anyone to use it, they covered it with sealed plastic, and they put it in a room with curtains to block direct sunlight. I thought purchasing furniture you would not use was useless.

There have been times at camp when we purchased a new van to transport campers from place to place. After many years, the van wore out. I was thankful for the many years and the memories the van gave us, and realized that its being worn out was a sign of its value.
We are to use what God gave us, and it will wear out. Wearing it out is a sign that it was enjoyed.