The longest river in the USA and third largest in the world, the Mississippi drains 40 percent of the country, including the majority of its farming heartland. At present, there are no federal laws governing pollution being dumped into the Mississippi River, and last year alone some 817,000 tons of nitrogen made its way into the Gulf of Mexico via the river. These agricultural chemicals have led to the largest ever 'deadzone' (an area so starved of oxygen that it cannot sustain life) in the history of the Gulf. The Mississippi River is one of the largest rivers in the world and drains 40% of the USA. Chemical fertilizers from industrial agriculture and urban runoff are contributing to create one of the largest dead zones in the world in the Gulf of Mexico.
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