shouldn't we plant billions of trees now?....
'
No.
You do that,
you are disturbing existing ecosystems without caring about them.
Okay, maybe planting billions of trees sounds a little too much to me, too, but what about illegal (or legal, whatever(?)) deforestation? Isn't is disturbing existing ecosystems without caring about them? Didn't it even occur to anyone that we must at least
compensate for the harm we have already done to balance it out?
Well, of course we need to approach things rationally. You can't put trees that are not native to a region there without studying it first. They are plenty of trees that you can't put too close together or that you shouldn't put near certain other kinds of trees. The key is though that, like you say, CokeIHead, we should at least replace what we've already removed. The ideal situation would be if we could replace at least all the trees that we're already cutting down. Ideally, they should be the same kind of trees too.