comes from corn ethanol—the most abundant biofuel produced by the United States. The industry for corn ethanol and other biofuels has exploded since 2006, when renewable fuels were mandated to be mixed with conventional gasolines.
Bruce Babcock, "Is Corn Ethanol A Low Carbon Fuel?" Iowa Ag Review. Iowa State University. Fall 2007. Michael Wang writes, "In the late 1990s, the USDA conducted a detailed simulation of land use changes to accommodate corn ethanol production of 4 billion gallons per year. The simulation ...
The author thinks that replacing gas with corn ethanol is . A. impractical B. acceptable C. admirable D. useless 相关知识点: 试题来源: 解析 [答案]A [解析]作者意图判断题。根据全文可知作者认为用corn代替gas是不符合实际的,会带来很多意想不到的问题。反馈 收藏 ...
Producing ethanol and biodiesel from corn and other crops is not worth the energyPatzek, Tad WPimentel D,Patzek T W.Producing ethanol and biodiesel from corn and other crops is not worth the energy. NRR . 2005
Researchers at Michigan State University found that it is not energy-efficient to produce ethanol from grain crops that can serve as food, rather, it is more efficient to produce ethanol from cellulosic feedstocks such as grasses. The study compared different ways of growing corn, soybean, and ...
laboratory found that it takes approximately three BTUs of energy to produce four BTUs of corn ethanol. Gasoline, on the other hand, takes five BTUs of energy to produce the same four BTUs. Although the net energy from ethanol production is greater than that of gasoline, gasoline is still...
The problem is that the amount of energy we get from corn-based ethanol isn't much more than the amount of energy that gets put into making it,so it's not really worth it. Tina? FEMALE STUDENT: But ethanol made from cellulose is different?
The problem is that the amount of energy we get from corn-based ethanol isn't much more than the amount of energy that gets put into making it. So it's not really worth it. Tina? Student: But ethanol made from cellulose is different? Professor: Yes. It's possible to get a vastly ...
Finally, Krugman conveniently forgets that concerns about global warming are the main reason that corn prices have skyrocketed since 2005. Nowadays 40 percent of corn grown in the United States is used to produce ethanol(乙醇),which does absolutely nothing for the climate, but certainly distorts ...
One might get a bit more energy out of the ethand than that used to make it, which could still make ethanol more sustainable than gas generally, but that’s not the end of the problem.Using corn to make ethanol means less corn is left to feed animals and people, which drives up the...