Envirocoal may just prove to be a rich find for Indonesia. This extremely clean burning coal from Borneo mined by P T Adaro, an Indonesian and Australian company, has a low content of sulphur and ash and is a relatively cheap fuel that is environment friendly. The coal contains just 0.1 per cent sulphur - a sulphur content of less than I per cent is considered low - so producers believe that demand for it will be on the upswing as environmental consciousness grows.