In fact，GM foods are already very much a part of our lives.They were first put on the market in 1996.A third of the corn and more than half the cotton grown in the U. S.1ast year was the product of biotechnology，according to the Department of Agriculture.More than 65 million acres of genetically modified crops will be planted in the U. S. this year.The genetic genie is out of the bottle.

　　However.1ike any new product entering the food chain，GM foods must be subjected to careful testing.In wealthy countries，the debate about biotech is not so fierce by the fact that they have a large number of foods to choose from，and a supply that goes beyond the needs.In developing countries desperate to feed fast-growing and underfed populations，the matter is simpler and much more urgent：do the benefits of biotech outweigh the risks?

　　The statistics on population growth and hunger are disturbing.Last year the world’s population reached 6 billion. The U.N.states that nearly 800 million people around the world are unhealthy.About 400 million women of childbearing age don’t have enough iron，which means their babies are exposed to various birth defeats.As many as 100 million children suffer from vitamin A deficiency，a leading cause of blindness.

　　How can biotech help? Genetic engineering is widely used to produce plants and animals with better nutritional values.Biotechnologists have developed genetically modified rice and they are working on other kinds of nutritionally improved crops.Biotech can also improve farming productivity in places where food shortages are caused by crop damage attributable to drought，poor soil and crop viruses.

【2016届高三英语二轮复习周测卷：18（含解析）（河北衡水）】相关文章：

★ 2017届高考英语二轮复习课时训练：6（含解析）

★ 山西省永济市涑北中学高三英语总复习：美文欣赏（2）（Unconditional Love）

★ 2017年高考英语二轮复习精品资料：专题15 完形填空（押题专练）（原卷版）

★ 北京市2014高考英语一轮复习 练习手册（16）必修4 Unit 1 Women of achievement（含解析）新人教版

★ 【课堂新坐标】2017届高考英语（通用版）二轮复习短文改错专题训练：训练4 短文改错（Ⅳ）（含解析）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：13（含解析）

★ 2016届高三英语二轮复习周测卷：11（含解析）（河北衡水）

★ 【北师大版】2014届高考英语一轮复习指导课时作业：Unit 9 A卷 Word版含解析

★ 2017届高考英语二轮复习书面表达限时测验：7（含解析）

★ （安徽专用）2014届高考英语一轮复习方案 作业手册（11）模块4 《Unit 11 The Media》（含解析） 北师大版必修1