United States: 'Dead zones' threaten oceans

Atlantic Journal Constitution: When you look in the waters of coastal Georgia and you see an ocean seemingly teeming with life, it is difficult to comprehend that large sections of the world's oceans are considered "dead zones.' These are areas of the oceans where low levels of dissolved oxygen have either killed or driven off most of the fish and shellfish sought by commercial and recreational fishermen. Oxygen-deprived areas of ocean have spread exponentially since the 1960s, affecting a total area of more than ...