Sentence:  Plastics are energy-rich substances, which is why many of them burn so readily. Any organism that could unlock and use that energy would do well in the Anthropocene. Terrestrial bacteria and <WSD>fungi</WSD> which can manage this trick are already familiar to experts in the field. 
Meaning of the word marked with <WSD> tags:  Any member of the kingdom Fungi; a eukaryotic organism typically having chitin cell walls but no chlorophyll or plastids. Fungi may be unicellular or multicellular.