Bioethanol firms currently extract sugars from crops like grains and sugar beet, but some are developing technologies to extract energy from fibre such as wheat bran, straw or wood.

• 那些从事生物乙醇生产的公司目前已经普遍能够从谷物和甜菜等农作物中提取出糖的成份，但还有一些公司对此仍不满足，他们眼下正在致力于从包括麦麸、草以及木材在内的众多富含纤维的物质中获取能源。