Typically, if we look at the life cycle of any of these feedstocks, especially when you're using biomass—let's say forest biomass—if you're using it for producing renewable natural gas, the key aspect that goes into the emissions and contributes to the overall life-cycle emissions.... For forest biomass, you're looking at emissions associated with harvesting and transportation, and then at conversion emissions. With regard to most of the typical emissions up to delivery to the plant, you'd look at their being in the range of about, I would say, 5% to 10% of the overall emissions that you are producing.
If I compare this with, let's say, the typical natural gas-based emissions, you are still looking at a reduction of 60% to 70% of the GHG emissions after you take into account the fossil fuel that goes into bringing this biomass to the centralized plant.