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Anthropogenic activities and natural processes release dichloromethane (DCM, methylene chloride), a toxic chemical with substantial ozone‐depleting capacity. Specialized anaerobic bacteria metabolize DCM; however, the genetic basis for this process has remained elusive. Comparative genomics of the three known anaerobic DCM‐degrading bacterial species revealed a homologous gene cluster, designated...
Many biotic and abiotic processes contribute to nitrous oxide (N2O) production in the biosphere, but N2O consumption in the environment has heretofore been attributed primarily to canonical denitrifying microorganisms. The nosZ genes encoding the N2O reductase enzyme, NosZ, responsible for N2O reduction to dinitrogen are now known to include two distinct groups: the well‐studied Clade I which denitrifiers...