Limnology global inland waters as part of the Earth System created a sub-discipline called global limnology. This approach considers the role of inland aquatic ecosystems in carbon cycling. Limnology is closely related to aquatic ecology and hydrobiology, which study aquatic organisms and their interactions with the abiotic (non-living) environment. While limnology has substantial overlap with freshwater-focused disciplines (e.g., freshwater biology), it also includes the study of inland salt lakes. The term limnology was coined by François-Alphonse Forel (1841–1912) who established the field with his studies of Lake Geneva. Interest in the discipline rapidly expanded, and in 1922 August Thienemann (a German
The Secret of Divine Civilization societies need, and that certain valuable subjects are neglected in the process. His counsel on this is that "the individual should, prior to engaging in the study of any subject, ask himself what its uses are and what fruit and result will derive from it. If it is a useful branch of knowledge, that is, if society will gain important benefits from it, then he should certainly pursue it with all his heart." The Secret of Divine Civilization The Secret of Divine Civilization is a book written anonymously by `Abdu'l-Bahá in 1875, addressed to the rulers and the people of