You're quite right that wood biomass is not fully carbon-neutral when fossil fuels are expended in harvesting it and transporting it. UK biomass is estimated t

You're quite right that wood biomass is not fully carbon-neutral when fossil fuels are expended in harvesting it and transporting it. UK biomass is estimated to have a total-lifecycle carbon footprint of 230g CO2 per kWh. This is much worse than wind, solar, or nuclear. But still a very significant improvement on burning coal and natural gas! Compared to coal, it's about a 4x improvement.