The term "bio-spheres" refers to self-contained ecosystems that can support life. Some antonyms for this concept could be "barren wastelands," which are areas where life cannot thrive due to harsh environmental conditions. Another antonym could be "asphalt jungles," referring to urban areas that are heavily paved and lack natural habitats. "Toxic landscapes" could also be an antonym for bio-spheres, as these are areas where pollution and contamination have made the environment uninhabitable for most forms of life. Overall, antonyms for bio-spheres would suggest a world that is devoid of natural ecosystems and the balance of life that they provide.