In lines 5-6 there is a positive-negative contrast, the poet refers to the Greek sea-god Proteus who lost all this hopes “all hopes of Proteus rising from the sea have sunk” because “he is entombed in the waste”. The word “entombed” refers to natural destruction and suggests he is hidden in the waste of the sea by the excess of pollution and contamination. This terrible image adds to the sympathy than the reader has in regards of Nature.