Throughout it's 40-year history, there's been a great deal of finger-pointing by the proponents of "Earth Day." Some points are legitimate; much is not (the myth of the so-called "population explosion" comes immediately to mind).
But the truth is, all the blame-gaming in the world cannot cover up the essential truth: we are in exile in this "vale of tears" because of sin. God made the Earth and saw that it was good—He does not deal in evil. But then, through our own choice, we turned our backs on the Author of Life and will continue to do so, thereby not just despoiling the world but our eternal souls!
Unless we follow Saint Paul's admonition:
If then you were raised with Christ, seek what is above, where Christ is seated at the right hand of God. Think of what is above, not of what is on earth.
Colossians 3:14
So plant a tree, if you want to. Recycle your soda bottles. Whatever. But remember, no matter what you do, this place we live in has an expiration date that will not be extended. Heaven, on the other hand, lasts forever. Make every day "Heaven Day."(H/T: Father Dennis Brown, O.M.V.)