Methanization reduces the volume of organic waste and prevents biogas produced by fermentation, including methane, a potent greenhouse gas, from being dispersed into the atmosphere. Biogas is also used to produce heat, electricity and even biomethane for injection into the natural gas grid. Yves Andrès and Khaled Loubar, researchers at IMT Atlantique, tell us more about this technology which is emerging as a key driver of energy transition.