In order to better understand the environmental impact and economic feasibility of increased bioethanol energy crop production, in 2007 and 2010 our research team hired a professional tenant farmer to grow and collect data on energy crops, and visited the Taiwan Agricultural Research Institute (TARI), local Agricultural Improvement Stations, tenant farmers, and the Taiwan Sugar Corporation. We collected complete life cycle data on resource and financial inputs during the cultivation, harvesting, transportation, and storage of four different energy crops: com, sweet potato, sugar cane, and sweet sorghum. In addition, we used experimental ethanol production data to create a comprehensive model of large scale commercial production of ethanol in Taiwan which includes assessments of energy inputs related to the cultivation of energy crops, greenhouse gas emissions, and production costs.