Cleaning up mercury pollution and reducing prenatal exposure to the neurotoxin methylmercury (MeHg) could save the European Union €10,000 million per year, finds a new study published in BioMed Central's open access journal Environmental Health. New estimates suggest that between 1.5 and 2 million children in the EU are born each year with MeHg exposures above the safe limit of 0.58µg/g and 200,000 above the WHO recommended maximum of 2.5µg/g.
While some mercury occurs naturally in the environment for example from volcanic eruptions or forest fires, most is generated by burning fossil fuels. Marine and fresh water species bioconcentrate MeHg; consequently the main source of exposure for humans is from eating fish.
A team of researchers from across Europe used the DEMOCOPHES study of exposure to environmental chemicals to assess the impact of MeHg on humans. Hair samples of child-mother pairs, collected from 17 European countries, demonstrated that, as a lower estimate, 1,866,000 children are born in Europe exposed to toxic levels of MeHg. 232,000 of these are exposed to hazardous levels, five times higher. But not every child in Europe is equally at risk. When analysed per country, children born in Portugal and Spain were the most exposed to MeHg, and Hungary the least.
Exposure to MeHg in humans affects brain development, resulting in a lower IQ, and consequently a lower earning potential. The long term cost to society can be calculated as lifetime earning loss per person, although this estimate does not take into account other aspects of brain toxicity or risks of cardiovascular disease in adults.
Prof Philippe Grandjean explained, "If we convert the effects of MeHg on developing brains into IQ points then the benefits of controlling MeHg pollution equates to 700,000 IQ points per year and monetary benefits of €8,000 to €9,000 million per year for the whole of the EU. Exposure abatement would mainly benefit southern Europe ."
Once MeHg is formed, it cycles though the environment for thousands of years, exposing humans and other species to potentially toxic levels for generations. Commenting on the research Dr Elsie Sunderland said, "Mitigating the harm caused by methylmercury requires global-scale cooperation on policies and source reductions. Negotiations by the United Nations Environment Program are currently underway to address mercury emission levels."
BioMed Central: http://www.biomedcentral.com
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
The White House organized this large private-sector commitment
Water scarcity is leading farmers away from planting staples and towards planting higher-value, lower-water specialty crops. Think wine grapes and pomegranates instead of citrus and avocados.
A new study suggests these giant prehistoric mammals were not taken down by human hunters alone
Ankle-deep mayflies covered a Mississippi River bridge connecting Iowa to Illinois
NPR's Melissa Block speaks with John H. Richardson about his recent Esquire piece, "When the End of Human Civilization Is Your Day Job."
Amazonian wilderness buzzed with human activity until 500 years ago, when Europeans turned up with weapons and diseases, says radical rethink of rainforest history
The two permits issued Wednesday clear the way for oil drilling in Chukchi Sea, but with some conditions and limits
Iraq's fabled marshes are seeing some of the lowest water levels since Saddam Hussein drained them in the 1990s
"Climate change is not science fiction"
NPR's Melissa Block speaks to Mike Halpert, deputy director of the National Oceanic and Atmospheric Administration's Climate Prediction Center, about a strengthening El Nino season.