Two major problems in North America may both least be at least partially solved by a single concept we have proposed to convert uneconomical kraft pulp mills to wood-to-ethanol plant.

• 提出一个单一的概念也许可以部分解决北美的两个主要问题,这个概念就是将不经济的硫酸盐浆厂转化为木材-乙醇工厂。