How much forested land would be needed to produce all of the given country's power? (Assume that the given country has little fossil resources.) Is this a sustainable alternative? The following are given: a. The standing stock density is about 100 dry metric tons of wood per acre. b. Trees capture solar energy at an average rate of about 0.8 W/m^2 which corresponds to producing about 10 dry tons of biomass per acre. c. A representative efficiency of a biomass fired electric power plant is about 35%.