The GWP of 190 GJ of ethanol produced by the AP process is 9.1 t and the GWP of 190 GJ of gasoline is 17 t.
If the ethanol from the AP process replaced gasoline for fuel use it would have a GWP savings of 7.9 t ha1.
In contrast to using the unit energy basis, the GWP savings of the acetogen pathway on a per hectare basis is similar to
the GWP savings of the ethanologen pathway.