Montserrat (mountain) which are visible from a great distance. The mountain is composed of strikingly pink conglomerate, a form of sedimentary rock. Montserrat was designated as a National Park in 1987. In 1493, Christopher Columbus named the Caribbean island of Montserrat "Santa Maria de Montserrate", after the "Virgin of Montserrat". The Benedictine Abbey can be reached by road, by the Aeri de Montserrat cable car, or by the Montserrat Rack Railway. The lower stations of both the rack railway and the cable car can be reached by Ferrocarrils de la Generalitat de Catalunya train from Barcelona's Plaça d'Espanya station. From the abbey,
Mercury in fish plant emissions. Chlorine chemical plants use mercury to extract chlorine from salt, which in many parts of the world is discharged as mercury compounds in waste water, though this process has been largely replaced by the more economically viable membrane cell process, which does not use mercury. Coal contains mercury as a natural contaminant. When it is fired for electricity generation, the mercury is released as smoke into the atmosphere. Most of this mercury pollution can be eliminated if pollution-control devices are installed. Mercury in the United States frequently comes from power plants, which release about 50% of the nation's