The Organic Foods
Are organically grown foods the best food choices?The advantages claimed for such foods over conventionally grown and marketed food products are now being debated. Advocates of organic foods -- a term whose meaning varies greatly -- frequently proclaim that such products are safer and more nutritious than others. The growing interest of consumers in the safety and nutritional quality of the typical North American diet is a welcome development. However, much of this interest has been sparked by sweeping claims that the food supply is unsafe or inadequate in meeting nutritional needs. Although most of these claims are not supported by scientific evidence, the preponderance of written material advancing such claims makes it difficult for the general public to separate fact from fiction. As a result, claims that eating a diet consisting entirely of organically grown foods prevents or cures disease or provides other benefits to health have become widely publicized and form the basis for folklore. Almost daily the public is besieged by claims for no-aging diets, new vitamins and other wonder foods. There are numerous unsubstantiated reports that natural vitamins are superior to synthetic ones, that fertilized eggs are nutritionally superior to unfertilized eggs, that untreated grains are better than fumigated grains and the like. One thing that most organically grown food products seem to have in common is that they cost more than conventionally grown foods. But in many cases consumers are misled if they believe organic foods can maintain health and provide better nutritional quality than conventionally grown foods. So there is real cause for concern if consumers particularly those with limited incomes, distrust the regular food supply and buy only expensive organic foods instead.
2017届高考英语一轮复习课时知能训练:人教版选修八 Unit 5《Meeting your ancestors》
2017版英语一轮精品复习学案:Unit1《Cultural relics》(新人教版必修2)
高考英语作文复习素材 :建议信 A Letter of Suggestion
高考英语作文复习素材 :健康的生活方式 Healthy Life Style
2017版英语一轮精品复习学案:Unit4《Body language》(新人教版必修4)
2017届高考英语一轮复习课件人教版必修三 unit5《canada—“the true north”》
2017版英语一轮精品复习学案:Unit2《The United Kingdom》(新人教版必修5)
2017届高考英语一轮复习课件人教版必修三 unit4《astronomy:the science of the stars》
2017届高考英语一轮复习课件人教版必修三 unit2《healthy eating》
2017版英语一轮精品复习学案:Unit1《Festivals around the world》(新人教版必修3)
2017届高考英语一轮复习课件人教版必修三 unit3《the million pound bank note》
2017届高考英语一轮复习课件人教版必修三 unit1《festivals around the world》
2017版英语一轮精品复习学案:Unit3《A taste of English humour》(新人教版必修4)
2017版英语一轮精品复习学案:Unit3《The Million Pound Bank Note》(新人教版必修3)
2017届高考英语一轮复习课时作业6:Unit 1《Cultural relics》(人教版必修2湖北专用)
2017版英语一轮精品复习学案:Unit1 Great scientists(新人教版必修5)
2017版英语一轮精品复习学案:Unit4《Making the news》(新人教版必修5)
2017版英语一轮精品复习学案:Unit5《First aid》(新人教版必修5)
背熟这20篇范文 2017中考英语作文轻松得满分
2017版英语一轮精品复习学案:Unit5《Canada-“The True North”》(新人教版必修3)
2017届高考英语一轮复习课时作业2:Unit 2《English around the world》(人教版必修1湖北专用)
2017届高考英语一轮复习课时知能训练:人教版选修八 Unit 4《Pygmalion》
2017版英语一轮精品复习学案:Unit5《Theme parks》(新人教版必修4)
2017届高考英语一轮复习课时作业4:Unit 4《Earthquakes》(人教版必修1湖北专用)
2017届高考英语一轮复习课件人教版必修二 unit2《the olympic games》
2017版英语一轮精品复习学案:Unit2《English around the world》(新人教版必修1)
高考英语作文复习素材 :控制污染 Population Control
2017届高考英语一轮复习课时知能训练:人教版选修八 Unit 3《Inventors and inventions》
2017届高考英语一轮复习课时作业7:Unit 2《The Olympic Games》(人教版必修2湖北专用)
2017届高考英语一轮复习课件人教版必修四 unit1《women of achievement
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |