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Industrial areas and seasonal zones of oxygen depleted waters

Industrial areas and seasonal zones of oxygen depleted waters

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Uploaded 16 Feb 2012 by GRID-Arendal
Year: 2009
From collection: Vital Water Graphics 2
Author: Phillipe Rekacewicz, (Le Monde diplomatique) February 2008
Description:
This graphic illustrates the strong link between areas with high densities of industrial activity and zones of seasonally oxygen-depleted waters. There is a strong link between areas with high densities of industrial activity and zones of seasonal oxygen-depleted waters. In recent years there has been an increasing focus on treating and reducing municipal and industrial waste, and on reducing nitrogen levels in agricultural runoff. However, less attention has been paid to the continually increasing nitrogen emissions into the atmosphere. It is believed that between 10% and 70% of the fixed nitrogen input in many coastal regions is currently delivered by rain and the fallout of nitrogen compounds from the atmosphere. GESAMP (Joint Group of Experts on the Scientific Aspects of Marine Environment Protection) recommends that atmospheric nitrogen must be included among the nutrient sources assessed as part of the management of coastal water quality. Political factors are also of major ...
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