Pouco se ouve falar por cá da morte lenta dos oceanos ...

Dead zones are hypoxic (low-oxygen) areas in the world's oceans, the observed incidences of which have been increasing since oceanographers began noticing them in the 1970s. These occur near inhabited coastlines, where aquatic life is most concentrated. (The vast middle portions of the oceans which naturally have little life are not considered "dead zones".) The term can also be applied to the identical phenomenon in large lakes. wiki

150 'dead zones' counted in oceans
U.N.: Ocean 'dead zones' increasing fast
Science Focus: Dead zones
Ocean Dead Zones Growing; May Be Linked to Warming
Ocean Dead Zones May Be Worse Than Thought