the largest aluminium companies worldwide. In Norway, Hydro has plants in Magnor, Rjukan, Raufoss, Vennesla, Karmøy, Høyanger, Årdal, Husnes, Sunndalsøra, and Holmestrand. Most of the employees in the company work in plants and offices located outside Norway, such as Germany and Brazil. Hydro has more employees in the United States than any other Norwegian company. In 2010, Hydro and QatarEnergy inaugurated their 50-50 joint venture Qatalum, located in Qatar. It was the largest aluminium plant ever launched in one step. Its annual capacity in September 2011 was 585,000 metric tons of primary aluminium, all to be shipped as value added aluminium casthouse products. A 1350 MW natural gas power plant was also built to ensure a stable supply of electricity. In 2010, Hydro acquired the Brazilian bauxite, alumina and aluminium production assets of Vale, an international mining and metals company. In September 2013, Hydro combined its aluminium extrusion operations with that of Sapa, making Sapa a 50/50 joint venture between Hydro and the Norwegian company Orkla. Hydro then acquired Orkla's 50% ownership in Sapa in October 2017, taking over the company and turning it into a new business area within Hydro, called Extruded Solutions. The agreed enterprise value for 100% of Sapa was NOK 27 billion. Energy Hydro is a major producer of hydroelectric power in Norway. To secure electricity for its aluminium production Hydro has signed a power purchase agreement with the Fosen Vind wind farm, which is scheduled to be fully operational in 2020. Under this agreement Fosen Vind will deliver around 0.6 TWh in 2020, around 1.0 TWh annually from 2021 to 2035 and 0.7 TWh annually from 2036 to 2039, for a total of about 18 TWh over a 20-year period. Hydro Agri Though Hydro started off as a fertilizer producer and agricultural products was for a long time one of the companies major ventures, the agricultural division was in 2004 demerged into the independent company Yara International, listed on the Oslo Stock Exchange. Environmental issues In February 2018 Hydro was forced to cut aluminium production by 50% in its plant located in Pará, Brazil (operated by the joint venture Albras). This followed allegations that untreated and contaminated water had been released to the environment, resulting in water pollution. A team of local researchers found a clandestine waste pipe and highly elevated levels of aluminum in its proximity. Other substances such as nitrate, sulphate, chloride and