In the tested MP leachate, some sequences of a metagenomic dataset remained unidentified (Fig. S1), indicating that the anaerobic degradation processes in landfill prisms may be conducted by
unknown species. Nevertheless, the next-generation sequencing and q-PCR data suggest that the modern landfill prisms are still inhabited by a complex microbial community and that the collaborative consortia are efficient in the degradation of deposited organic compounds, despite their limited availability and biodegradability.