(a) AMR risk matrix computed by using MetaCompare; the X- and Y-axis represented the portions of ARGs-carrying contigs and MGE-ARG both carrying contigs in all assembled contigs. And the Z-axis indicated the portion of contigs annotated with pathogen genomes as well as ARGs and MGEs. (b) Estimated intake rate of ARGs from landfill-specific airborne PM_2.5 particles and drinking water. The risk assessment data and calculations were provided in Supporting Information-3.