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England. Greater Manchester. Salford. A Jewish cemetery near a coal-fired power. In loving memory of Rebecca Solomon. The Star of David, known in Hebrew as Magen David  "Shield of David"), is a generally-recognized symbol of modern Jewish identity and Judaism. Its shape is that of a hexagram, the compound of two equilateral triangles. Industrial site. A coal-fired power station or coal power plant is a thermal power station which burns coal to generate electricity. Coal-fired power stations generate over a third of the world's electricity but cause hundreds of thousands of early deaths each year, mainly from air pollution. A coal-fired power station is a type of fossil fuel power station. The coal is usually pulverized and then burned in a pulverized coal-fired boiler. The furnace heat converts boiler water to steam, which is then used to spin turbines that turn generators. Thus chemical energy stored in coal is converted successively into thermal energy, mechanical energy and, finally, electrical energy. Powered Energy Plant. The coal-fired facilities account for the majority of air emissions from the electric power sector. The most prominent of these air emissions are nitrogen oxides (NOx), sulphur dioxide (SO2), particulate matter (PM), mercury and greenhouse gases such as carbon dioxide (CO2). Small amounts of toxic metals such as arsenic, cadmium, chromium and nickel are also released. Major environmental issues related to the pollutants emitted are acid rain, smog, toxic substances and climate change. Salford is a city in the Metropolitan Borough of Salford in Greater Manchester. North West England is one of nine official regions of England. © 1990 Didier Ruef