New Scientist: "Dead zones" containing too little oxygen for fish to breathe are growing as global temperatures increase.Warmer water dissolves less oxygen, so as temperatures rise, oxygen vanishes from oceans. Marine biologists are warning that if dead zones continue expanding, oceanic "deserts" could massively deplete marine life and fish stocks.Previous studies have shown that surface layers of the ocean can be depleted of oxygen by pollution draining out from rivers, as in the Gulf of Mexico. However the …