One possibility is to use the remains of corn plants left in the field after harvest.This material is known as Stover.But stover protects against soil loss to wind and water.

• 有些人担心玉米作为乙醇生产的原料，用量不断增加会导致食品价格上涨，同时也担心玉米作为食品和饲料的原料减少了。