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China has rejected more than one million metric tons of United States corn since last November.The Chinese Government says it is not accepting shipments that include Agrisure Viptera made by the seed company Syngenta.China says it has not approved importing this genetically-modified kind of corn seed.A GMO food has had gens from other plants or animals added to its natural genetic content.America's National Grain and Feed Aociation says the rejection is costly.It says the Chinese action is responsible for almost $3 billion in loes to the U.S.agricultural industry.It's perhaps the most controversial pick in the history of a respected award.Three pioneers in the science of genetically modified crops are receiving this year's prestigious World Food Prize, Thursday, Oct.17 in Iowa.According to the prize citation, 17 million farmers worldwide grew these 'GMO' crops in 2012, more than 90 percent of them small-scale farmers in developing countries.It says the technology increased yields, reduced harmful pesticide use, and will be a key tool to feed the 9 billion people expected on Earth by 2050.But critics of the technology question the role of genetically modified organisms in fighting world hunger.When Mary Dell Chilton started her scientific career in the 1970s, she believed that a microscopic bacterium and a stalk of corn were much too different to be able to exchange genetic code.Every plant’s DNA is like hundreds of books’ worth of information: genes for productivity...flavor...heat tolerance...even harmful or toxic traits.Conventional breeding produces offspring with a random aortment of those bookay, instructions for a protein that kills insect pests but is safe for people.“That means that you don’t have to put insecticides on those corn plants to protect them and enhance the yield that you get.That’s a good thing,“ said Chilton
Nearly all the corn and cotton grown in the U.S.contain this type of gene, reducing insecticide use by at least 50 million kilograms per year.Critics, however, note that another modificationhas increased the use of weed killers.Hans Herren won the prize in 1995 for using natural methods to control a devastating insect pest outbreak in Africa.He says genetically modified organisms are not the best way to fight hunger.“Because I think the cause of the food shortages in some places have nothing to do or can’t be fixed with GMOs,” he said.Herren sees GMOs as just the latest version of the water-, fertilizer-and pesticide-intensive form of agriculture that he says is a dead end.“We need to change the paradigm because we are running out of fertilizer.Fertilizer production produces a lot of CO2.Water is limited, and will be even more limited in the future.So, again, we have to find better solutions,“ he said.And Herren says more research is needed on the health, environmental and social impacts of GMO crops that are rapidly spreading around the world.Opposition to them is also spreading rapidly.In the Philippines, protesters have uprooted test fields of rice modified to produce vitamin A.But, Mary Dell Chilton is confident GMO technology will help feed the world.”We need it.There are too many people in this world and we need to feed them in order to keep them from fighting with each other," she said.
Good afternoon, everyone! I am very glad to have a speech here.My name is ……, and my major is …….…….is my hometown, a famous city in the Three Kingdoms, a......
转基因食品安全研究1转基因生物的发展利用基因工程手段，将某些生物的基因转移到其它物种中去，改造它们的遗传物质，使其在性状、营养品质、消费品质等方面向人们所需要的目标转......
毛概课程报告小组成员及分工：潘奔（演讲稿）2012310200212 陈博文（PPT）：2012310200205 许航（查阅文献）：2012310200218 班级：应化1202班指导老师：彭慧蓉转基因食品之争演讲稿近年来，随着人......
Student A:prepare and deliver a short speech announcing the meeting open.Good morning, ladies and gentlemen:My name is xuyin.First of all, please allow me to ex......
转基因技术的利与弊辩论： 正方：转基因技术的利大于弊：1、转基因技术的优点： 1）解决粮食短缺问题2）减少农药使用，避免环境污染 3）节省生产成本，降低食物售价 4）增加食物种类，提升食品品......
