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Hemispheric Transport of Air Pollution 2010

Part B - Mercury

image of Hemispheric Transport of Air Pollution 2010
This is one part of a four-volume set that presents a state-of-the-science assessment of the intercontinental transport of air pollutants across the Northern Hemisphere. The first three volumes are technical assessments of the state-of-science with respect to intercontinental transport of ozone and particulate matter, mercury, and persistent organic pollutants. The fourth volume is a synthesis of the main findings and recommendations of Parts A, B, and C organized around a series of policy-relevant questions that were identified at the Task Force on Hemispheric Transport of Air Pollution’s first meeting.

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Observations

A large number of activities have been carried out in different regions of the world aiming to assess the level of mercury (Hg) in ambient air and precipitation, its variation over time, and how it varies with changing meteorological conditions. Recent studies have highlighted that in fast developing countries (i.e., China, India), Hg emissions are increasing in a dramatic fashion due primarily to a sharp increase in energy production from the combustion of coal [Mukherjee et al., 2009; Pacyna et al., 2010; Pan et al., 2007; Streets et al., 2005; Streets et al., 2009; Wu et al., 2006].

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