Coal pollution mitigation emissions of sulfur dioxide or oxides of nitrogen associated with the utilization of coal in the generation of electricity." Before being adopted in this fashion, historically "clean coal" was used to refer to clean-burning coal with low levels of impurities, though this term faded after rates of domestic coal usage dropped. The term appeared in a speech to mine workers in 1918, in context indicating coal that was "free of dirt and impurities." In the early 20th century, prior to World War II, clean coal (also called "smokeless coal") generally referred to anthracite and high-grade bituminous coal, used for cooking
Highest Hopes: The Best of Nightwish more than 20,000 sold copies. It was also Finland's best-selling album of 2005, having sold more than 65,000 copies, certified with double platinum. Today, it has sold more than 103,000 copies. Highest Hopes: The Best of Nightwish Highest Hopes: The Best of Nightwish is the third compilation album by Finnish symphonic metal band Nightwish. Their first, "Tales from the Elvenpath", was considered incomplete by many fans as it contains only tracks from "Oceanborn", "Over the Hills and Far Away", "Wishmaster" and "Century Child", leaving out "Angels Fall First". This compilation, though, contains songs from all previously released Nightwish albums, plus