In geological terms, about 12000 years ago Toronto was at the bottom of the ocean. CFCs have been eliminated from the atmosphere. CFCs are artificial. 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.