1. The Dead Zone Debate
... greatly intensified the problem. The second largest dead zone is the northern Gulf of Mexico, surrounding the outflow of the Mississippi River, in the summer of 2002, it covered 8,500 square miles (approximately the same size as the state of Massachusetts) (Gulf Hypoxia). The catchment area of the Mississippi River basin is vast, draining approximately 41% of the land area of the ... in the Gulf of Mexico since mapping of this annual oxygen-free zone began in 1985. Scientists estimate the 2012 Gulf of Mexico dead zone spans an area of 2,889 square miles (7,482 square kilometers), or jus...
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