The emissions of pollutants to Air and Water are collected via SERF. Particularly for PCF, the impacting pollutants are In Air: Other Greenhouse Gases (with GWP factors defined in IPCC-AR6) In Water: COD (Chemical Oxygen Demand) after WWTP, which can be used to define the CO2 emissions during the Wastewater treatment (today, not included in Scope 1)