Analysis of information sources in references of the Wikipedia article "替代能源" in Chinese language version.
In relation to coal and oil, the world's annual consumption has become so enormous that we are now actually within measurable distance of the end of the supply. What shall we do when we have no more coal or oil! .... There is, however, one other source of fuel supply which may perhaps this problem of the future. Alcohol makes a beautiful, clean and efficient fuel, and where not intended for human consumption can be manufactured very cheaply from corn stalks and in fact from almost any vegetable matter capable of fermentation.