chemicalororganicfarming517实用学习教程.pptx

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1、1).化肥2)细菌3).对造成损害4).洗掉某物5).导致;造成(后果);通往6).逐渐增强,堆积，建立7).另外(还有)8).使免受(影响);使不含(有害物)9).集中(注意力、精力)于10).每隔几年11).避免做fertilizerbacteriacause/do damage to wash offlead to build up in addition keepfree from/of focus on every few years avoid doing第1页/共26页第2页/共26页Chemical Or Organic Farming?第3页/共26页Skim to find

2、 the topic sentence or main idea for each paragraph.Long-term use of chemical fertilizers can cause damage to the land and peoples health.Problems caused by chemical fertilizers Farmers and customers turn to organic farming.Other methods to keep the soil fertile.Para 1Para 2Para3para4Part1Part 2chem

3、ical farmingorganic farmingStructure:第4页/共26页1 Why are chemical fertilizers so popular in farming today?2 After the long-term use of chemical fertilizers,what have scientists found?Many farmers welcomed them as a great way to stop crop disease and increase production.Long-term use of chemical fertil

4、izers can cause damage to the land and,even more dangerous,to peoples health.Read Para 1 and answer the following questions.第5页/共26页Chemical farmingproblemscause1._ the landby_ the helpful_ and pests _harmful ones2._ crops,animals and humansby _ in the ground and underground water3._ cancer or other

5、 illnessesby_ in peoples bodies over time4.fruit,vegetables and other food_ less_by _ too fastdamageaffectlead tohavenutritionkillingbacteriaas well asstayingbuilding upgrowing第6页/共26页Organic farmingMethods advantages1.use _from animals as fertilizersmake-richer in minerals and so more fertile and k

6、eep-free of chemicals.2.change the kind of crop in each field _put-back into-,making it ready for other crops3.plant different crops with different rootsuse different levels of soil4.plant grass between crops and then _ it in the groundprevent-from-and become a natural fertilizernatural wasteevery f

7、ew yearsleaveRetell Part 2The same goal:_to grow good food and to avoid damaging the environment or peoples health.第7页/共26页Organic farming has advantages.First of all,organic farmers focus on keeping the soil rich and free of disease.And whats more,organic farming keeps the soil and crops free from

8、chemicals.In order to increase the production,they change the kind of crop in each field every few years.Finally,some organic farmers prefer planting grass between crops to prevent wind or water from carrying away the soil.In a word,Organic farming has the same goal:to grow good food and to avoid da

9、maging the environment or peoples health.第8页/共26页Listening and watching第9页/共26页Para1 Topic Para2 ProblemsPara3 AdvantagesPara4 Several methodsillustration（阐明）comparison conclusionThe type of the article is_Exposition（说明文）The structure of this passage第10页/共26页垫江报社征文:绿色行动进行中征写与环保相关的英文文章.导言：古往今来，地球妈妈用甘

10、甜的乳汁哺育了无数代子孙。原来的她被小辈们装饰得楚楚动人。可是，现在人类为了自身的利益，将她折磨得天昏地暗。人类只有一个地球；而地球正面临着严峻的环境危机。“救救地球”已成为世界各国人民最强烈的呼声。我们大家都喜欢蓝蓝的天空，清澈的湖水，新鲜的空气，渴望生活在鸟语花香里，希望我们的家园更美丽。要想实现这些我们垫江人现在就应该开始行动了。以“Plastic or Cloth Bags?”为题写一篇说明文。(请模仿这篇文章的篇章结构和句子结构)第11页/共26页使用塑料袋的害处有：1.“白色污染”的主要来源；2.不可回收再利用；3.燃烧污染空气；4.埋掉(200年不会溶解)污染土壤和地下水。使用环

11、保袋的好处有：1.可以大量减少塑料袋的使用；2.使用寿命比纸袋长；3.可以循环利用；4.价格低廉，易于推广。第12页/共26页第13页/共26页第14页/共26页第15页/共26页第16页/共26页第17页/共26页第18页/共26页第19页/共26页Homework:Finish the writing.第20页/共26页Over the past half century,have become very common.welcomed them as a way to.Recently,however,we have been finding that they can cause da

12、mage to,even,to peoples health.What are some of the problems caused by?First of all,And whats more,in addition,Last but not least,With these discoveries,are beginning to turn to.The following words may help you.第21页/共26页 Over the past half century,plastic bags have become very common in our daily li

13、fe.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.第22页/共26页 What are some of the problems caused by plastic bags?First of all,people often leave plastic bags here and there,making wh

14、ite pollution.Whats more,it takes a long time,more than 200 years,to be exact,to break up.Last but not least,when heated,plastic bags can produce something harmful,which can build up in our body and eventually lead to cancer or other illnesses.第23页/共26页 With these discoveries,we are beginning to tur

15、n to cloth bags.They can be used many times.People can save a lot of source in this way.It is also a good idea to make some by ourselves,which is interesting.Lets use cloth bags in our daily life instead of plastic bags,not only for the environment protection,but also the sake of our health.第24页/共26页What do you think of the farming today?healthy?environment-friendly?natural?chemical?organic?green?transgenic?第25页/共26页感谢您的欣赏！第26页/共26页