Biomethane and Power to Gas are renewable energy sources with a low carbon footprint and which, when applied as a fuel, considerably lower CO2 emissions from natural gas vehicles. 

Biomethane is refined from biogas produced by the natural breakdown of organic material in waste from agriculture, municipal waste, plants, sewage or food waste.

Biomethane has the same composition as natural gas and can be injected into the natural gas distribution grid, or used directly by natural gas vehicles.

Power to Gas is the name given to the production of synthetic natural gas with surplus energy from wind farms or solar panels through a chemical process. It can be used directly by natural gas vehicles or it can be injected into the natural gas grid.

 Audi power to gas plantPower-to-Gas plant in Werlte, Germany (source: Audi)