LiveScience.com - Parts of the world's oceans are running low on oxygen, a new study finds. Fertilizers and other chemical pollutants in river runoff fuel blooms of algae that cause oxygen levels to dip precipitously when they die. A review of research into these so-called "dead zones," detailed in the Aug. 15 issue of the journal Science, finds that the number of dead zones has roughly doubled every decade since the 1960's. ...

More...