Subject(s): Energy crops -- Biomass energy -- biofuels biogas biomass accumulation renewable energy integrated energy farms -- basic elements of biomass accumulation -- harvesting , transportation and storage of energy crops -- Conversion technologies : Biomass to fuels, Ethanol, Oils, Solid biofuels, Wet biofuels, Biogas, Power and electricity , Fuel cells -- Environmental impact -- Economic and social dimensions : energy and development, Biomass stoves, Investment in the energy supply sector -- Renewable energy -- Energy plant species : potentials energy plan species list