1. Global emission of mercury to the atmosphere from anthropogenic sources in 2005 and projections to 2020
2. Mercury policy and regulations for coal-fired power plants
3. United States Environmental Protection Agency. National Emission Standards for Hazardous Air Pollutants from Coal- and Oil-fired Electric Utility Steam Generating Units and Standards of Performance for Fossil-Fuel-Fired Electric Utility, Industrial-Commercial-Institutional, and Small Industrial-Commercial-Institutional Steam Generating Units, 2011; http://www.epa.gov/airquality/powerplanttoxics/pdfs/proposal.pdf.
4. Council of the European Union. Council conclusions, Review of the Community Strategy concerning Mercury,3075th ENVIRONMENT Council Meeting, Brussels, 14 March 2011; http://www.consilium.europa.eu/uedocs/cms_data/docs/pressdata/en/envir/119867.pdf.