Anthracite latter in two or three sizes, all three being above in (38 mm) size on round-hole screens. High grade (HG) and ultra high grade (UHG) anthracite are the highest grades of anthracite coal. They are the purest forms of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities (moisture, ash and volatiles). High grade and ultra high grade anthracite are harder than standard grade anthracite, and have a higher relative density. An example of a chemical formula for high-grade anthracite would be CHONS, representing 94% carbon. UHG anthracite typically has a
Coal in Europe in coal mines, caused by the liberation of methane from mining. Annual coal carbon emissions (2005–2008 average) were highest per capita in Europe in Czech Republic 7.4, Kazakhstan 6.9, Poland 5.5, Finland 4.8, Serbia 4.5 and Germany 4.1. Coal in Europe Coal production in Europe is falling, and imports exceed production. There is, however, growing controversy in Europe over the use of coal, as many denounce it for reasons such as health risks and links to global warming. International Energy Agency reports data for EU28 countries since 1990. According to IEA, EU28 countries use of coal as fuel has went