period of time until in 1954 it was decommissioned. The structure remains in place and it is property of Gas Natural Fenosa. Other storage systems Gas more recently was stored in large underground reservoirs such as salt caverns. In modern times, however, line-packing is the preferred method. Throughout the 1960s and 1970s it was thought that gas holders could be replaced with high-pressure bullets (a cylindrical pressure vessel with hemispherical ends). However, regulations brought in meant that all new bullets must be built several miles out of towns and cities, and the security of storing large amounts of high-pressure natural gas above ground made them unpopular with local people and councils. Bullets are gradually being decommissioned. It is also possible to store natural gas in liquid form, and this is widely practised throughout the world. See also Gasometer Oberhausen Gashouse District Natural gas storage Water tower, similar utility storage structures Gasværket – a theatre in Copenhagen which was formerly a huge gas holder References Notes Bibliography Further reading External links Use of gasometers in Oil & Gas industry Condemned: The great gasometer from BBC News, January 28, 1999 Gasometer Augsburg in Germany and a list of many Gasometers in Europe Gasometer Schlieren, Switzerland "The rise and fall of gasometers" Extrageographic magazine Gasholders and their tanks Early London Gas Industry Visits_to_Works 1894_Institution_of_Mechanical_Engineers: including Manchester and Salford Gas Works Gas technologies Petroleum production