Barcelona (Freddie Mercury and Montserrat Caballé song) important performance occurred on 8 October 1988, at the open air La Nit festival in Barcelona, which was staged on the occasion of the arrival of the Olympic flag from Seoul. Together, Mercury and Caballé sang three tracks from the forthcoming album "Barcelona", namely "Barcelona", "How Can I Go On" and "The Golden Boy". This was the last live performance of Mercury who was already beginning to suffer from AIDS. Mercury died in 1991, and the recording of the song was played over a travelogue of the city at the start of the international broadcast of the 1992 Olympics opening
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