高中英语（m4）教学资料-u2 oganic farming.ppt

,Part 3. I. DAABD ADBAD BCBAD CDD 1. Thanks to / Because of 2. freedom 3. four times as high 4. is certain/ sure to 5.Getting up early is 6. with the hope of III. 1. a the 2. grow 改为growing 3.feed 前加to 4. country 改为countries 5. another改为 other 6. why改为that 7. kind改为 kinds 8. especial 改为 especially 9. most 前加the 10. in去掉,CHEMICAL OR ORGANIC FARMING?,Unit 2 Using Language Reading on P.14,Look at the title and picture and predict the content.,Chemical or Organic Farming?,What do we put on the soil to makes crops grow better ?,It is fertilizer.,How many kinds of fertilizers do farmers use ?,There are two kinds. They are chemical fertilizers and natural ones.,Chemical farming is farming by using _ _to stop crop disease and increase production. Organic farming is simply farming _ _ _ _.,What is chemical farming ? What is organic farming ?,chemical fertilizers,without using any chemicals,.,Why are chemical fertilizers so popular in farming? 2.What problems can be caused by using chemical fertilizers? 3. What is the main reason for using organic farming methods?,1. Why are chemical fertilizers so popular in farming today?,Because farmers welcomed them as _ to stop crop disease and increase production.,a great way,Long-term use of these chemical fertilizers can _and _ to peoples health.,cause damage to the land,more dangerous,Paragraph 1,Paragraph 2,2. What are the problems caused by chemical fertilizers?,First, they _. Second, chemicals also stay _. These chemicals can _. Third, fruit, vegetables and other food grown with chemical fertilizers usually _. They look _.,for a long time,lead to cancer or,grow too fast to be full of much nutrition,beautiful,damage the land,3. What is the main reason for using organic farming methods?,The main reason for using organic farming methods is to _and to _ or_.,grow good food,avoid damaging the environment,peoples health,A summary,In recent days, scientists have discovered that _ chemical fertilizers for a long time can hurt the land and also peoples health. There are several problems _ by chemical fertilizers. They _ the land, _ in the ground and underground water for a long time and get into peoples bodies through their_. Organic farming is becoming more popular _some,using,caused,damage,stay,food,with,farmers and many customers after these discoveries came out. Organic farming does not use any_. Organic farmers use many _ to keep the soil fertile. All of these methods try to produce good food and _ causing damage to the environment or peoples health.,chemicals,methods,avoid,Translation 1.长期使用 2.化肥 3.给造成损害 4.将洗掉 5.逐渐增强 6.导致 7.有机耕作 8.集中于 9.使免受,long-term use chemical fertilizers cause damage to wash off build up lead to / result in organic farming focus on keep free from,10.保持土壤肥沃 11.每隔几年 12.防止水土流失,keep the soil fertile every few years prevent wind or water from carrying away the soil,What other ways can be used to increase production? 2. What other methods can be used for organic farming?,Discussion in groups of 4. One writes down, and then reports.,a. Water the plants with clean water. b. Leave the earth in its natural state after the harvest. c. Grow crops without pesticides d. Grow away from industrial areas. e. Keep animals free of drugs.,A.Animal waste b. Use pesticide pestisaid n.农药 c. Irrigate in time d. Plant at the right time e. Choose the best seeds f. GM foods (genetically-modified ),Listening This is the VOA Special English What is it about?,Listening This is the VOA Special English Agriculture Report. Agricultural scientists in Switzerland have demonstrated论证 the _ effects of organic farming methods. Organic farms use no man-made _ to increase crops or control insects and disease. The study showed that _ fields produced fewer crops, on average, than other fields. However, the scientists say the organic _ improved the_ of the soil and used half as much energy.,long-term,chemicals,organic,methods,health,Underline useful phrases 1.over the past half century 2.increase production 3.damage the land 4.build up 5.lead to 6.without using any chemicals 7.focus on 8.reduce disease 9.grow strong and healthy 10.use as 11.rich in 12.keepfree from 13.every few years 14.carry away,Write a summary,chemical fertilizers popular because scientists have discovered some problems Now organic farming use many kinds of methods All these methods try to ,Homework,Write the summary and hand them in.,Organic Farming,How many kinds of fertilizers do farmers use ? There are two kinds. They are chemical fertilizers and natural ones.,Main idea of the passage,Chemical fertilizers can cause many problems, so organic farming is becoming more popular.,ORGANIC FARMING,Structure of the text,I using chemical fertilizers for a long time can hurt the land and also peoples health II Problem caused by chemical fertilizers,1. Damage the land by killing the helpful bacteria and pests as well as the harmful ones,2. Lead to cancer or other illness.,3. Food grown with chemical fertilizers look beautiful, but inside there is usually more water than vitamins and minerals., Organic farming is becoming more popular with some farmers and many customers after these discoveries came out. IV Other methods to keep the soil fertile.,Step 1: Review,What can you say about these topics?,Working the land 土地耕作,Yuan Longping,Working the land