Non-ferrous metallurgy made the most effort and gave the most value to production and employed almost the half of employees in the mining industry. Construction materials made one eighth of it, as much as the coal, and half of it tobacco, wood and textile industry. The industries which generated the most of the revenues in 1987 were: electricity, production of machinery, ferrous metallurgy, textile, electrical appliances, metal works, food processing industry, footwear and wood Industry through 1980 reached considerable development level but in the 1990s it had stagnation in the development, manufacturing, employment and export. This stage and the war contributed to nearly complete collapse of Kosovo industry. Other production: In the period from 1965-1985, several factories for processing of metals were built, such as:  Kosovo was in very serious economic and social situation, i.e. it was in state of emergency. There was an immediate need for shelters, food, housing and refurbishment of houses and apartments. After the emergency phase, the commercialization process started in factories which failed to resume production in many factories (except few). The privatization process started in 2003, but there were delays and it failed to function properly for many reasons. Kosovo territory possesses significant lignite coal reserves of around 14 billion tonnes, small quantities of nuclear matter, resources geothermal energy level low and natural gas potential area. Kosovo has mineral resources deposits with the European level, it mainly has large reserves of silver, zinc, coal, lead, zinc, copper, iron, nickel and bauxite. That meets classification standards international trade (UNFC, JORC). In 2005 the Directorate for Mines and Minerals and the World Bank estimated that Kosovo had €13.5 Billion worth of minerals. However, Kosovo has a high density of population and buildings by South-Eastern European standards, and full exploitation of these resources at an acceptable environmental cost may not be easy. Coal   Coal (lignite) is the most important energy resource of Kosovo, which supplies about 97% of total electricity production. Estimated coal resources in throughout Kosovo are 12.5 billion tons, 8.6 billion tons of reserves are  that economically exploitable considered profitable. The wealth of the mine in Sibofc [Sibovac] is estimated at 6.5 billion euros, wealth of Trepca at 3 billion, wealth of Ferronickel 2 billion, whereas the wealth of the resources in other parts of Kosovo were estimated at 2 billion euros. At 14,700 Mt, Kosovo possesses the world's fifth-largest proven reserves of lignite.