feedingtheworld英语文章
Genetically Modified Foods—Feed the World?百里玄策连招口诀 If you want to spark a heated debate at a dinner party, bring up the topic of genetically modified foods.
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春娇与志明杨幂For many people, the concept of genetically altered, high-tech crop production rais all kinds of environmental, health, safety and ethical questions. Particularly in countries with long agrarian traditions and vocal green lobbies the idea ems against nature. In fact, genetically modified foods are already very much a part of our lives. A third of the corn and more than half the soybeans and cotton grown in the US last year were the product of biotechnology, according to the Department of Agriculture. More than 65 million acres of genetically modified crops will be planted in the US this year .销售礼仪培训The genetic is out of the bottle. The issue is simple and urgent .Do the benefits of biotech outweigh the risks? The statistics on population growth and hunger are disturbing 手机空间不足.Last year the world’s population reached 6 billion. And by 2 5 , the UN estimates, it will probably near 9 billion almost all that growth occur in developing countries. At the same time, the world’s available cultivable land
per person is declining. The UN estimates that nearly 8 million people around the world are undernourished. The effects are devastating. How can biotech help? Biotechnologists have developed genetically modified rice that is fortified with beta-carotene which the body converts into vitamin A and additional iron, and they are working on other kinds of nutritionally improved crops Biotech can also improve farming productivity in places 榕树下文学网where food shortages are caud by crop damage attribution to pests, drought, poor soil and crop virus, bacteria or fungi. Damage caud by pests is incredible. The European corn borer, for example, destroys 4 million tons of the world’s corn crop annually,about 7% of the total.Incorporating pest-resistant genes into eds can help restore the balance.In trials of pest-resistant cotton in Africa,yields have incread significantly. So far, fears that genetically modified, pest-resistant crops might kill good incts as well as bad appear unfounded. Virus often cau massive failure in staple crops in developing countries. Two years ago, Africa lost more than half its cassava crop a key source of calories to the mosaic virus. Genetically modified, virus-resistant crops can reduce that damage, as can drought-tolerant eds in regions where water shortages limit the amoun
果树盆景t of land under cultivation .Biotech can also help solve the problem of soil that contains excess aluminum, which can damage roots and cau many staple-crop failures. A gene that helps neutralize aluminum toxicity in rice has been identified .Many scientists believe biotech could rai overall crop productivity in developing countries as much as 25% and help prevent the loss of tho crops after they are harvested
