I don't know but I guess they don't intend to leak a lot from their own device/tank and once they have sold it to the pipeline they consider it "consumed". The

I don't know but I guess they don't intend to leak a lot from their own device/tank and once they have sold it to the pipeline they consider it "consumed". The idea is to capture the same amount of CO2 from the air as is in the methane that is consumed.