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.
雅思听力背景材料:极光
怎样拿到雅思听力考试满分成绩
雅思听力背景词汇:植物
雅思听力经难点冲关:长数字
分享雅思听力备考实用方法
五个练习雅思听力的小窍门
雅思听力分数低的7大原因
雅思听力提高七步走
五个雅思听力提高的必备技巧
雅思听力地图题常见方位词总结
雅思听力场景词汇:课题和课程
雅思听力核心词汇:大学院系与课程
雅思听力背景词汇:时间的简单表达
雅思听力高分 预测技巧很重要
三个提高雅思听力成绩的技能
雅思听力背景词汇:政治
遵守三点 让雅思听力练习事半功倍
雅思听力备考高分技巧
雅思听力常见旅行场景词汇
雅思听力必须克服的三大坏习惯
雅思听力背景材料:英国概况
提高六方面能力 拿雅思听力高分
雅思听力常见的九大问题解答
雅思听力分类词汇:地质学
雅思听力的核心预测技巧
雅思听力填空题答题技巧
总结:雅思听力考试审题“四宗罪”
雅思听力常见词汇:人物
雅思听力澳洲口音应对技巧
雅思听力常见词汇:人物描述
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