From KUT:
An oxygen-deprived “dead zone” in the Gulf of Mexico would take decades to reverse, according to a study from the University of Waterloo in Canada.
The so-called dead zones form when water doesn’t have enough oxygen for fish and other marine life to survive, which researchers attribute to agricultural runoff along the Mississippi River – namely industrial fertilizers – that makes its way into the Gulf.
Released last month, the study says, even if farmers were to completely stop the flow of runoff right now, it would take at least 30 years to dissipate.