Because the fuel source comes from waste, there's no need to develop new land for planting crops. Thus it is far more energy efficient and environmentally friendly than first-generation biofuels that are mostly based on food crops.
由於料源來自廢棄物，不需要額外闢地種植作物，在能源效益和環保效益上都遠高過以糧食為主的第一代作物。