The potential for short-rotation woody crops to reduce U.S. CO2 emissions.

摘要: Short-rotation woody crops (SRWC) could potentially displace fossil fuels and thus mitigate CO2 buildup in the atmosphere. To determine how much fuel SRWC might United States what associated carbon savings be, a series of assumptions must be made. These concern net biomass yields per hectare (after losses); amount suitable land dedicated to production; wood conversion efficiencies electricity or liquid fuels; energy substitution properties various used growing, harvesting, transporting, converting biomass. Assuming current climate, present production, technologies considering conservative estimate U.S. base available for (14 × 106 ha), we calculate that 33.2 73.1 Mg releases, 3–6% annual emissions. The mitigation potential unit is larger with coal-based production than SRWC-derived ethanol gasoline. predicted technology advancements, an optimistic (28 average (22.4 dry Mg/ha), 148 242 releases. Under this scenario, SRWC-based would equivalent about 4.4% global emissions 20%