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. <WSD>Terrestrial</WSD> bacteria and fungi which can manage this trick are already familiar to experts in the field. 
Meaning of the word marked with <WSD> tags:  Of, relating to, or inhabiting the land of the Earth or its inhabitants, earthly.