Below is a summary of CO2 Wash® benefits and improvements upon competitive technologies: a variety of methane products enabled from landfill gas, food grade liquid CO2 recovered as second product, storable, transportable products, no commercial separation agent for bulk contaminant removal, separation agent, liquid CO2, obtained from raw landfill gas, continuous fresh solvent, no regeneration necessary, reliable contaminant removal to ppb levels, verification of siloxane removal from landfill gas verification of sulfur compound removal from landfill gas, verification of halogenated compound removal from landfill gas, verification of NMOC (non-methane organic compound) removal from landfill gas, removal of "new" contaminants guaranteed, well defined contaminant control and disposal.