chemical or organic farming？

1、Chemical or organic farming?Which kind of apples do you prefer? Why? green food organic food natural fertilizers chemical fertilizers 1. What is organic farming? Farming without using chemicals. 2. What is the goal of using organic farming methods? To grow good food and avoid damaging the environmen

2、t or peoples health.SkimmingGet the main idea of each paragraph.para1: A new discovery of scientists.para2: Several problems caused by using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.Skimming1.Why are chemical fertilizers so pop

3、ular in farming today? 2.After using chemical fertilizers for a long time, what have scientists found?Scanning1.Why are chemical fertilizers so popular in farming today?Many farmers welcomed them as a great way to stop crop disease and increase production.present situation Recently, however, long-te

4、rm use of chemical fertilizers can cause damage to the land and ,even more dangerous, to peoples health.2. After using chemical fertilizers for a long time, what have scientists discovered?Tip1:Some adverbs are often used in writing, such as thus, therefore, meanwhile, anyhow, otherwise, moreover, b

5、esides, in addition, whats worseThere are mainly three problems. First, they can 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. This affects crops and therefore animals and humans, since.

6、be washed off. build up over time. lead to .In addition,They may look beautiful, but inside . Read Para 2 and find out the problems caused by using chemical fertilizers.Tip2: connectives（过渡词）（过渡词） and transitional phrases（过渡词组）（过渡词组） for development列举理由的常见表达 first, second, thirdfinally firstly, seco

7、ndly, thirdlyfinally first of all, next ,then, last but not least for one thing,for another on one hand ,on the other handScanningorganic farming1. What organic farming methods do farmers use?2. What are the advantages of these methods? MethodsAdvantages1. use natural waste from animals as fertilize

8、rsmake the soil richer in minerals and more fertile MethodsAdvantages1. use natural waste from animals as fertilizersmake the soil richer in minerals and more fertile2. change the kind of crop in each field every few yearsput important minerals back into the soil, making it ready for other crops Met

9、hodsAdvantages1. use natural waste from animals as fertilizersmake the soil richer in minerals and more fertile2. change the kind of crop in each field every few yearsput important minerals back into the soil, making it ready for other crops3. plant different crops with different rootsuse different

10、levels of soil4. plant grass between crops and then leave it in the groundprevent wind or water from carrying away the soil and become a natural fertilizer MethodsAdvantages1. use natural waste from animals as fertilizersmake the soil richer in minerals and more fertile2. change the kind of crop in

11、each field every few yearsput important minerals back into the soil, making it ready for other crops3. plant different crops with different lengths of rootsuse different levels of soil4. plant grass between crops and then leave it in the groundprevent wind or water from carrying away the soil and be

12、come a natural fertilizer They often change the kind ., for example, growing corn or wheat 2. Crops such as peas or soybeans 3. Organic farmers also plant crops to, for example, Tip3: If possible, examples can be taken to support your opinions. 1.Crops such as peas or soybean put important minerals

13、back into the soil, making it ready for crops that need rich and fertile soil.2. Some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil and thenTip4: complex sentences can make the passage logical（逻辑的）（逻辑的） and beautiful.-ing form & Attribut

14、ive clauseTip5: try to use some nice phrases in writing.Tip1:Some adverbs are often used in writing.Tip2: Use some connectives（过渡词）and transitional phrases（过渡词组）for development.Tip3: If necessary, examples can be taken to support your opinions.Tip4: Complex sentences can make the passage logical（逻辑的

15、） and beautiful.Tip5: Try to use some nice phrases in writing.para1: A new discovery of scientists.para2: Several problems caused by using chemical fertilizers.para3: The advantages of using organic farming. para4: Some methods to keep the soil fertile.The structure of this passagePara1 TopicPara2 P

16、roblemsPara3 AdvantagesPara4 Several methodsintroductioncomparison conclusionThe type of the article is_exposition（说明文）（说明文）Practice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和这篇文章的篇章结构和句子结构写一篇说明文。句子结构写一篇说明文。Plastic Or Cloth Bags?introductioncomparison conclusionPara1:Para2:Para3:Para4: Have a bri

17、ef illustration of the present situation. The problems caused by using plastic bags. The advantages of using cloth bags. Conclusion.Discussion and writing使用环保袋的好处有：使用环保袋的好处有：1.1.可以大量减少塑料袋的使用；可以大量减少塑料袋的使用； 2.2.使用寿命比纸袋长；使用寿命比纸袋长； 3.3.可以循环利用；可以循环利用； 4.4.制作简单，可以体现个性。制作简单，可以体现个性。使用塑料袋的害处有：使用塑料袋的害处有：1.“1.

18、“白色污染白色污染”的主要来源；的主要来源；2.2.不可回收再利用；不可回收再利用；3.3.燃烧污染空气；燃烧污染空气；4.4.埋掉埋掉(200(200年不会溶解年不会溶解) )污染土壤和地下水。污染土壤和地下水。Over the past half century, have become very common , welcome them as a .way to .Recently, however, we have been finding that they can cause damage to ,even , to peoples health. What are some o

19、f the problem caused by .? First, . Also,. Finally, .With these discoveries, are beginning to turning to . For one thing, . For another,All in all, lets welcome and say no toThe following structure may help you.Homework :Finish the writing after class.Thanks for your cooperation! Over the past half

20、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. What are some of the problems caused by plastic bags? First, people often leave plastic bags here and there, making white pollution. Second, it takes a long time, more than 100 years ,to be exact, to break up .Last but not l