Watershed Pollution

Pollution reaches the Mariana Trench

The amphipods were contaminated with PCBs — polychlorinated biphenyls — toxic chemicals used for decades in industry, as well as other industrial pollutants known as persistent organic pollutants.

“Every sample we had,” Jamieson says, “had contaminants in it at very high or extraordinarily high levels.”

Concern Over “Sustained” Man-Made Hypoxia

The gulf dead zone is only one piece of a larger, environmental problem with U.S. agriculture and watershed issues, however. The gulf just happens to be one of the areas where effects of agricultural practices and pollution are more visible. These kind of problems, though, are far reaching, effect the whole country and are heavily tied to government and industry.