The hottest American new energy law benefits biofu

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On January 2, the price of crude oil futures in New York jumped to $100 a barrel, a record high. The shortage of fossil resources has become an unavoidable problem. In the eyes of many people, biofuels have become an effective "recipe" to resolve the resource crisis and global warming. The US new energy act just promulgated is a powerful evidence

according to the act, by 2020, the U.S. automotive industry must reduce the fuel consumption of vehicles by 40% compared with the current level, so that vehicles can travel an average of 35 miles per gallon (1 mile equals 1.6093 km). This is the first time since 1975 that the US Congress has passed legislation to raise the fuel consumption standard of automobiles. In addition, the bill also encourages a significant increase in the use of biofuel ethanol, which will reach 36billion gallons by 2022

when signing the bill, Bush said that the most serious long-term challenge facing the United States is its dependence on oil, and the new bill effectively addresses this weakness of the United States. It marks a "big step" for the United States in reducing its dependence on oil, coping with global warming and increasing renewable energy

however, the academic community is much more cautious about biofuels. For the biofuels that have been produced on a large scale, such as corn ethanol and biodiesel, the academic circles currently hold two different views on hr30n. Some experts believe that the greenhouse gas emissions of corn ethanol fuel for automobiles are 40% lower than that of gasoline; However, some experts pointed out that in terms of the whole life cycle of the product, the total greenhouse gas emissions of this biofuel are even 50% higher than that of gasoline

unlike fossil fuel 52 concrete pavement bricks, biofuels are renewable. The two most familiar biofuels are bioethanol and biodiesel. Bioethanol usually refers to a kind of alcohol extracted from corn, wheat, sugarcane and other plants. Biodiesel is usually made from soybean, palm oil, other vegetable oil or animal oil. These fuels are not only renewable, but also absorb carbon dioxide from the air because they are made from plants. However, on the other hand, these biofuels will produce more greenhouse gases in the production process and emit them into the atmosphere

some experts say that the production of bioethanol requires a large amount of energy, which is also an important starting point for industrial optimization and upgrading in the southern part of the main urban area of Zibo City. Firstly, the production equipment and process of bioethanol need coal as power. Moreover, the production of crops such as corn requires the use of chemical fertilizers, while the production of chemical fertilizers requires fossil energy. Driving tractors to harvest these crops also requires gasoline. In other words, the conversion of corn into ethanol not only requires fossil fuels as energy, but also emits a large amount of greenhouse gases into the atmosphere

in addition, if forests are cut down to open up new land for biofuel crops, the absorption of carbon dioxide will also be greatly reduced. Experts from the University of Berkeley in the United States pointed out that if one hectare of forest land is converted into plant land for biofuels, the greenhouse gas emissions in 30 years will be as high as 150 tons of carbon

in addition, the use of corn, soybean and palm oil as raw materials for biofuels may cause another problem. The shore a hardness value is obtained The shortage of crops originally used for food production due to the production of fuel is bound to cause price fluctuations. Recently, as more and more palm oil is used to produce biofuels, the price of palm oil in the international market has nearly doubled to about $900 per ton

some people also advocate the application of the second generation biofuel technology, that is, using straw and grass as raw materials to produce biofuels to meet the needs. However, some researchers still hold different opinions: using non food crops to produce biofuels is not a panacea. First, the cost and efficiency of fermentation are far from meeting the requirements. Second, if forests are cut down or cultivated land is occupied for planting these crops, it will cause more serious greenhouse gas pollution or make food supply more scarce. The debate in the academic circles may not end until the achievements of scientific and technological innovation achieve major breakthroughs one day in the future

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