Social sustainability is the ability of a social system, such as a country, to function at a defined level of social well being indefinitely. A more complete definition of sustainability is thus environmental, economic, and social sustainability.
Depiction of the human body and bacteria that predominate. A microbiota is the ecological community of commensal, symbiotic and pathogenic microorganisms that literally share our body space.Joshua Lederberg coined the term, emphasising the importance of microorganisms inhabiting the human body in health and disease.he symbiotic relationship between animal host and microbiota has a significant impact on shaping the immune system. The immune system is able to recognize the types of bacteria that are harmful to the host and combats them, while allowing the helpful bacteria to carry out their functions.
A microorganism or microbe is a microscopic living organism, which may be single-celled or multicellular. The study of microorganisms is called microbiology, a subject that began with the discovery of microorganisms in 1674 by Antonie van Leeuwenhoek, using a microscope of his own design. Microorganisms are very diverse and include all bacteria, archaea and most protozoa. This group also contains some species of fungi, algae, and certain microscopic animals, such as rotifers. Many macroscopic animals and plants have microscopic juvenile stages. Some microbiologists also classify viruses (and viroids) as microorganisms, but others consider these as nonliving.