The carbon benefit of using biomass depends on the balance between the carbon absorbed by plants during growth and the emissions produced during processing and transport. While biomass is often considered carbon neutral, the fossil fuels used by ships, trucks, and trains to move it from distant regions do add extra carbon to the atmosphere.
The extent to which these transportation emissions offset the benefits depends on several factors. First, the total distance traveled is crucial. Second, the mode of transport matters, as maritime shipping is generally much more efficient per ton than road transport. Third, the energy density of the biomass type affects how much fuel is required for the journey.
In most modern energy models, the carbon savings from replacing fossil fuels still outweigh the emissions from transport, provided the supply chain is optimized. However, if biomass is moved across extremely long distances using inefficient methods, its overall effectiveness as a low carbon energy source decreases significantly. Therefore, sourcing biomass locally or regionally is preferred to maximize the total environmental gains and ensure that the entire energy system remains truly sustainable and efficient for the future.
