Ambun, Alex Unya Malaysia's coal resources opportunities and challenges Alex Unya Ambun. - 2000 Minerals: underpinning yesterday's needs. Today's development. The coal resource of Malaysia to date is estimated at about 1,050 million tonnes, of which about 725 million tonnes are found in Sarawak and the rest mainly in Sabah. Subjects--Topical Terms: Coal--SabahCoal--Sarawak Subjects--Geographic Terms: Sabah