this poem makes sense of social critic to the development of real estate which mostly cutting down the trees and demaging environment. The poet takes a pity of this condition, because the environment more and more demages. the irony in this poem is stated on line 2, "a billboard lovely as a tree", that is the billboard which simbolizes real estate which stands taking place forests (the tree). through his verse the poet also shows his anger of losing the forests. Because according to him, though the real estate fall, the forest will still disapear and the environment will still damage