Chemosynthesis's the biological conversion of one or more carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic molecules (for example hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis. Chemoautotrophs organisms that obtain carbon through chemosynthesis are phylogenetically diverse, but groups that include conspicuous or biogeochemically-important taxa include the sulfur-o… (More on Chemosynthesis)