Etymology: named once the Bulgar tribes who settled the decrease Balkan area inside the seventh century A.D. Bulgaria is comparatively well-endowed with several different equally metallic and nonmetallic minerals. Geologic exploration has identified about 40 coal basins, which together consist of Just about 3 billion tons of tested recoverable reserves. https://andersonapdsg.actoblog.com/29857811/detailed-notes-on-bulgaria