Youâ(TM)re not taking into account the nature of economics. Human beings can engineer their environment. They will do so when it becomes economically feasible to do so.
It's been economically feasible to do it since the 50's, but it was less profitable than just destroying the environment so we haven't. We're close to a point of no return outside of the tree issue, and showing no efforts to fix the problems it'll cause. When it hits, it'll be too late to start caring. We're also already seeing signs of it. It's called Climate Change, and we're going to suffer because of it
There are more trees now than there have ever been in human civilization.
This is entirely false. At one point the area that makes up the United States was 90% tree coverage, and that was less than 250 years ago, well within civilization. It's now less than 15%. The rain forests are almost gone. They also were destroyed in that same 250 year window.
We're suffering from what is unfettered greed and capitalism, and there's a lot of blood not yet paid to keep capitalism working, since capitalism runs on blood, and blood alone.