Book-4-Unit-2-Using-language-Chemical-Or-Organic-Farming

1、 Unit 2Working the land 1. Have you ever been to the farm?2. Do you know how to work on a farm? Step 1: warming up Step 1: warming upLets go to the farm!First, select and buy the seeds from the store.Second, we need to plough or turn over the soil.Third , we sow the seeds in the soil.In order to inc

2、rease production, we need to rid the soil of the weeds, water the crop, fertilize the soil and kill off the pest.Finally, we can harvest our crop. fertilizer How many kinds of fertilizers do farmers use? There are two kinds. They are chemical fertilizers and natural ones. Chemical Or Organic Farming

3、?化学耕作还是有机耕作？化学耕作还是有机耕作？Which kind do farmers use when they are doing organic farming? Recently, however, scientists have been finding that long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to peoples health. What are some of the problems caused by using ch

4、emical fertilizers? With these discoveries, some farmers and many customers are beginning to turn to organic farming. Organic farmers also use many other methods to keep the soil fertile.para1: para2: para3: para4: Tips: Find out each topic sentence.Get the main idea of each paragraph.Skimming:Para

5、1: Long-term use of chemical fertilizers can cause damage to the land and peoples health.Para 2: There are problems caused by chemical fertilizers.Para 4: There are other organic farming methods to keep the soil fertile. Para 3: Farmers and customers turn to organic farming.Why are chemical fertiliz

6、ers so popular in farming today? Many farmers welcomed them as a great way to stop crop disease and increase production.long-term use of chemical fertilizers can cause damage to the land and, even more dangerous, to peoples health. However,Second readingPara 1: Long-term use of chemical fertilizers

7、can cause damage to the land and peoples health.First, they damage the land by killing the helpful bacteria and pests as well as the harmful ones. Chemicals also stay in the ground and underground water for a long time, which leads to cancer or other illness.In addition, Food grown with chemical fer

8、tilizers grow too fast to be full of much nutrition. first; second; finally;whats more; in addition; last but not least .Para 2: There are problems caused by chemical fertilizers.What are problems caused by chemical fertilizers?First, select and buy the seeds from the store. Second, we need to ploug

9、h or turn over the soil. Third , we sow the seeds in the soil. Whats more, in order to increase production, we need to rid the soil of the weeds, water the crop and kill off the pest. Finally, we can harvest our crop. seedsploughsow12345Read paragraph 3 2.What are the advantages of organic farming?

10、The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals.1. What is organic farming? Farming without using chemicals. The methods to keep the soil fertile1 using natural waste from animals as fertilizer. 2 changing the kind of c

11、rop in each field every few years .3 planting crops to use different levels of soil4 planting grass between cropsThe same goal : _ to grow good food and avoid damaging the environment or peoples health.para1: A new discovery of scientists.para2: Several problems caused by using chemical fertilizers.

12、para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）（阐明）comparison conclusion请以请以“PLASTIC OR CLOTH BAGS?”为题为题模模仿仿这篇文章的篇章结构这篇文章的篇章结构和句子结构写一篇大约和句子结构写一篇大约2

13、00词的文章。词的文章。Discussion and practicePlastic Or Cloth Bags?illustration（阐明）（阐明）comparison conclusionPara1:Para2:Para3:Para4: Have a brief illustration of the present situation. The problems caused by using plastic bags. The advantages of using cloth bags. Conclusion.现状：现状：塑料袋方便携带东西，在日常生活使用广泛。塑料袋方便携带东西

14、，在日常生活使用广泛。但污染环境，危害人们健康。但污染环境，危害人们健康。使用塑料袋的问题：使用塑料袋的问题：1.人们到处乱丢塑料袋，造成白色污染。人们到处乱丢塑料袋，造成白色污染。2.需要花很长时间去溶解（需要花很长时间去溶解（break up） 。3.燃烧时会产生有害气体，导致癌症或其他疾燃烧时会产生有害气体，导致癌症或其他疾病。病。使用环保袋的好处：使用环保袋的好处：可循环利用，节约资源。可循环利用，节约资源。总结：总结：建议人们使用环保袋。建议人们使用环保袋。Plastic Or Cloth Bags?Over the past half century, have become ve

15、ry common . welcomed them as a way to . Recently, however, we have been finding that they can cause damage to , even , to peoples health. Over the past half century, plastic bags have become very common in our daily life. We welcomed them as a convenient way to carry goods. Recently, however, we have been finding that they can cause damage to the environment, even worse, to peoples health.塑料袋方便携带东西，在日常生活使用广泛。塑料袋方便携带东西，在日常生活使用广泛。但污染环境，危害人们健康。但污染环境，危害人们健康。现状：现状：塑料袋方便携带东西，在日常生活使用广泛。塑料袋方便携带东西，在日常生活使用广泛。但污染环境，危害人