Biogenic CO2 and nonbiogenic CO2are both included in the results.
Biogenic CO2 refers to carbon that is part of the natural carbon cycle.
This includes CO2 sequestration in the poplar biomass and CO2 produced from combustion of biomass.
Non-biogenic CO2 refers to CO2 emissions produced from fossil fuel combustion.
Biogenic CO2is sometimes omitted when calculating the GWP as this CO2is part of the carbon cycle, but is included in this study so that a full carbon mass balance can be presented.