Green Bioconversion of Asbuton Bitumen into Hydrocarbon-Rich Oil by Trichoderma sp. Based on GC–MS Characterization A. Johan, I. Sulistiyani, A. L. Giri Toba, A. H. Watoni, L. O. A. Nur Ramadhan, C. Baskar, L. O. Ahmad International Journal of Acta Material Vol. 2 No. 2 2026 DOI 10.62749/ijactmat.v2i2.27