Drax Group station in the UK. In 1988, Drax became the first power station to invest in the retrofit of flue-gas desulfurization (FGD) equipment, making Drax the cleanest coal-fired power station in the UK. This removes at least 90 per cent of the sulfur dioxide (SO2) from emissions. Through retrofitting boosted-over-fire-air (BOFA) technology on all the boilers emissions of oxides of nitrogen (NOX) are being further reduced. At the same time, by-products of the coal combustion and FGD processes are recycled through their further use in the construction industry. In 2012, Drax power station completed a five-year £100 million project – the
Yorkshire and the Humber stations along the Aire Valley, with Drax being the second largest in Europe with 3,945 MW of capacity, and Eggborough which is owned by the Czech Republic's Energetický a průmyslový holding (EPH) since 2014 and was owned by British Energy until 2010; Ferrybridge C closed on 23 March 2016. The distribution area once looked after by the regional electricity company Yorkshire Electricity is now looked after by Northern Powergrid (former YEDL), owned by Berkshire Hathaway (since 2001) of Omaha, Nebraska. The supply side of the region is now owned by npower (former National Power, now owned by RWE of Essen,