I think u cannot make a picture say something that is not there.
There is certainly no sense of "human forgetting" nor of the "importance of nature" in this pic.
I think an easier way to start - if you are a newbie - is to learn what a scene or a picture can say, and simply try to capture that, and see if people see the same message in your picture. If they do then you have successfully used your camera to capture a scene "message".
You need to learn a language's vocabulary before you can write an essay don't you think so? So there is a visual vocabulary to be learnt too.
And what your picture is telling me, amongst other things, is that nature is resilient, ie despite what man do, a tree can still survive. But then again I am not sure. I may be reading too much into it, as there are no details of the tree to let me know if it is indeed healthy and living or it is actually dying.