The real reason why trees are important
Trees ⇒ Oxygen ⇒ Life
For the past 5,000 years we have been felling forests and not re-planting.
All of Europe, to mention one area, was once forest. Dense, impenetratable
forest, the type of forest we popularly call "rain-forest" falsely believing that this is/was a feature of Africa and South America. So many trees that after 3,000 years of felling it still took the better part of 2,000 years to remove the last parts. Even 1,200
years ago you still could not cross the Iberian peninsula for forest, and that fact was recorded by a "Roman": a notorious composite demographic famous for clearing forests and making roads everywhere when not waging war on this or that people for any conceivable reason.
Those forests were the source of the oxygen we breathe now. And, they are gone.
The oxygen is not being re-generated, so it is also going.
A balloon the size of Earths atmosphere takes a very long time to empty. And, mind you, to refill. If possible.
Let's make Earth GREEN again!
At the very least, let us die trying.