Green gases are produced from 100 percent renewable energies and are therefore climate-neutral. When burned, they emit no more CO2 than was previously taken from the atmosphere for their production. Biomethane, for example, is a product of biogas produced by fermenting organic materials such as agricultural waste, residual materials from food production or sewage sludge. With the help of a process that removes unwanted byproducts, methane is produced and can be upgraded and injected into the gas grid.
Green gas offers several advantages in the context of climate protection. First, it can help decarbonize the gas grid by reducing the use of fossil natural gas. This is already being practiced today: up to ten percent gases from biogenic generation are incorporated. This reduces both CO2 emissions and dependence on fossil fuels. Second, green gas can serve as a storage medium for renewable energy. Excess renewable electricity can be used to generate green hydrogen or biomethane, which is stored via the gases and can then be converted back into electricity when needed. This helps stabilize the power grid and supports the expansion of renewable energies.