The speaker begins with a simple complaint: people take and take from nature, and never say thanks or give anything back. Then the poem turns personal. The speaker imagines their own death and asks to be buried in the ground, with plants growing through the body, so that it can rot and return what it once took from the trees.
The feeling here is quiet guilt mixed with acceptance. The speaker doesn't sound frightened of death. Instead, death becomes a way of paying a debt, and the body is treated as something borrowed. The shape of the poem helps with this. The lines start long and then shrink, ending in single words like "Give / Back" and a final stack of short lines about the trees. It looks a bit like something thinning out or sinking into the earth. The mood is calm, humble, and a little solemn, with a gentle hope that something living can come from the speaker's end.