Honest criticism please

[cbrer]

Not blindness tis' only my vision
Fading poorly away from me since
Showing the past of my fathers
And humanitys greatness evinced

Through time dimly to surface within me
While the poisons now through me run course
Searching madly but just one sin can be
Ahead of all others perforce

To not battle and conquer the evil
Ever present fore & aft of my birth
The ruiners, users, defilers
On the rock that I love my dear Earth

So now I hand to you my children
With what will be quite soon my last breath
A planet diminished and lonely
Closely matching the scene of my death

Thanks for your help.