The lecture counters the passage's conclusion that Ethanol is not a good alternative to gasoline by denying all three of the supporting arguments listed in the passage. The lecture addressed the effect on global warming, on animal feed and the influence of government subsidy respectively as follows.First of all, the lecture admits that the buring of Ethanol does release CO2 to the atmosphere as the passage argues. However, the passage further asserts this does not mean the use of Ethanol adds to global warming because of what happened in the growing process of those plants used to derive Ethanol from. For example, when corn is raised, it absorbs CO2 from the atmosphere, which is released back into the atmosphere when Ethanol produced from those exact corn is burnt. By exploring the development process of ethanol from its life stage as plants, the lecture undermines the passage's argument that ethanol makes global warming worse.Secondly, countrary to the passage, the lecture believes large scale ethanol production does not reduce the amount of food for animals. According to the lecture, the passage mistakenly assumes that the production of ethanol utilizes the same material used for animal feed. That assumption is off. In fact, nowadays people only use cellulose, a part of the plant cell walls that animals normally dont eat to produce ethanol. Because the materials used in Ethanol production generally don't overlap with animal feed, the passage's position that ethanol production reduces animal feed does not hold water according to the lecture.Lastly, the lecture projects that Ethanol price will eventually be able to compete with gasoline price even without government subsidy, which the passage stresses as the only reason why ethanol price is kept competitive today. The lecture believes these subsidies will not always be needed, because as more people buy ethanol at the gas pump, the production will go up and the price will come down as more ethanol becomes availabe to the market. A study shows with three times of ethanol production today, the unit price will drop by 40 percent. That, the lecture believes, is sufficient to keep Ethanol price competitive even without government subsidies. 11分钟