摘要: The Sun is sending around 174 peta watts of light energy to the Earth where only about 120 can reach surface after losses during penetrating through Earth's atmosphere. In fact, truly used solar for production biomass on land 74 tera counting arable and photosynthesis efficiency, which ca. 6% (the area / area) 1%, respectively. Presently, total human consumption requires 15 watts, therefore it still makes bioenergy 5 times more than what being consumes. Thus, major question now in near future how efficiently transfer from biofuels. This chapter will describe current four forms ie sucrose, starch, ligno-cellulose plant oil by different crops. It also briefly convert biofuels methods. An analysis conversion efficiency converting an economic evaluation using be carried out. A suggestion discussion brought up change one form another vivo increase crops efficient use