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Environ Sci Technol. 2018 Sep 4;52(17):9556-9561. doi: 10.1021/acs.est.8b02286. Epub 2018 Aug 20.

A Critical Time for Mercury Science to Inform Global Policy.

Author information

Dartmouth College , Department of Biological Sciences , Hanover , New Hampshire 03755 United States.
Syracuse University , Department of Civil and Environmental Engineering , Syracuse , New York 13244 United States.
U.S. Geological Survey , Corvallis , Oregon 97331 United States.
U.S. Environmental Protection Agency , Region-10 , Seattle , Washington 98101 United States.
University of Wisconsin , Madison , Wisconsin 53706 United States.
Duke University , Department of Civil & Environmental Engineering , Durham , North Carolina 27708 United States.
Natural Resources Defense Council , Washington , D.C. 20005 United States.
Environment and Climate Change, Canada , Burlington , ON L7P2X3 Canada.
University of Connecticut , Department of Marine Sciences , Groton , Connecticut 06340 United States.
University of Massachusetts, Lowell , Department of Environmental, Earth and Atmospheric Sciences , Lowell , Massachusetts 01854 United States.
Boston University , Frederick S. Pardee School of Global Studies , Boston , Massachusetts 02215 United States.
Massachusetts Institute of Technology, Institute for Data, Systems, and Society , Department of Earth, Atmospheric and Planetary Sciences , Boston , Massachusetts 02139 United States.
University of Rhode Island , College of Nursing , Providence , Rhode Island 02903 United States.


Mercury is a global pollutant released into the biosphere by varied human activities including coal combustion, mining, artisanal gold mining, cement production, and chemical production. Once released to air, land and water, the addition of carbon atoms to mercury by bacteria results in the production of methylmercury, the toxic form that bioaccumulates in aquatic and terrestrial food chains resulting in elevated exposure to humans and wildlife. Global recognition of the mercury contamination problem has resulted in the Minamata Convention on Mercury, which came into force in 2017. The treaty aims to protect human health and the environment from human-generated releases of mercury curtailing its movement and transformations in the biosphere. Coincident with the treaty's coming into force, the 13th International Conference of Mercury as a Global Pollutant (ICMGP-13) was held in Providence, Rhode Island USA. At ICMGP-13, cutting edge research was summarized and presented to address questions relating to global and regional sources and cycling of mercury, how that mercury is methylated, the effects of mercury exposure on humans and wildlife, and the science needed for successful implementation of the Minamata Convention. Human activities have the potential to enhance mercury methylation by remobilizing previously released mercury, and increasing methylation efficiency. This synthesis concluded that many of the most important factors influencing the fate and effects of mercury and its more toxic form, methylmercury, stem from environmental changes that are much broader in scope than mercury releases alone. Alterations of mercury cycling, methylmercury bioavailability and trophic transfer due to climate and land use changes remain critical uncertainties in effective implementation of the Minamata Convention. In the face of these uncertainties, important policy and management actions are needed over the short-term to support the control of mercury releases to land, water and air. These include adequate monitoring and communication on risk from exposure to various forms of inorganic mercury as well as methylmercury from fish and rice consumption. Successful management of global and local mercury pollution will require integration of mercury research and policy in a changing world.

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