Manufacturing of styrofoam has contributed to atmospheric CFCs. CFCs are halocarbons. Viruses are acellular and live on materials of other life. Bacteria are prokaryotes. Mushrooms are photoautotrophic eukaryotes.
Humans are heterotrophic eukaryotes.
The Archaebacteria are eukaryotes. In two weeks the biomass of a corn crop doubled. The net productivity is positive. The net productivity is zero. The gross productivity is positive.