Presented herein are compositions including a linear tenso-active surfactant which, upon contact and mechanical stirring of a hydrocarbon body, induces emulsification, resulting in oxidation of fatty acid aliphatic bodies. The compositions solve the problem of hydrocarbon pollution. The hydrocarbon decomposer and its by-products dissolve hydrocarbons present in polluted bodies such as clays, soils, water and sand. Methods of the invention create a residue that is a fertilizer, at room temperature and with no need for high pressure.