Unit2 Integrated skills 1--高中英语牛津译林版（2020）选修第一册.pptx

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1、 Unit 2 Working the landComparing chemical farming and organic farmingComparing chemical farming and organic farmingTo read an article from a website about chemical farming;To listen to an interview about organic farming;To compare chemical farming and organic farming;To discuss chemical farming and

2、 organic farming.pCan you think of ways to increase crop harvest?pWhat makes crops grow faster&better?It is fertilizer.How many kinds of fertilizers do you know?There are two kinds.Chemical fertilizersNatural fertilizers Chemical fertilizersNatural fertilizers Chemical farmingOrganic farmingBetter?S

3、arah is doing research on farming in order to write an article for the Farm to School Week.She has found a website article about chemical farming.ALook at the title and answer the following question.What do you know about chemical farming?Many farmers use chemical farming as a great way to increase

4、crop production,but it does damage to the environment as well as peoples health.Chemical farmingRead the website article and fill in the table with the topic sentence of each paragraph.ParagraphTopic sentencePara.1Para.2Para.3Para.4The use of chemicals in farming is widespread with more than 90 per

5、cent of the worlds farmers using artificial fertilizers and pesticides.The fact is that chemicals work faster than organic products.The downsides of using chemicals in farming are obvious.It is important to weigh the pros and cons of chemicals before using them.Focus on the description of chemical f

6、arming by completing the following table based on the article.Chemical farmingPresent(1)_The use of chemicals in farming is(2)_ with most farmers using artificial fertilizers and pesticides.Ways to make decisions(3)_ more about the advantages and disadvantages of using chemicals in farming will help

7、 you decide(4)_ food you will eat.situationwidespreadUnderstandingwhatChemical farming(5)_ for farmers using chemicalsChemicals work faster than organic products,(6)_ allows plants to grow faster.Crops can(7)_ from pests due to the quick action of artificial pesticides.Disadvantages of using chemica

8、ls in farming(8)_ polluting the environment,they also affect all living organisms,either immediately or over long periods of time.Reasonswhichbe protected Apart fromChemical farmingIt is commonly acknowledged that chemicals are an important tool for farmers;(9)_,it is important to(10)_ the pros and

9、cons of chemicals before using them,and to minimize the damage they do if possible.howeverweighRead the website article again and answer the following questions.(1)What is the present situation of using chemicals in farming?(2)Why has the worlds bee population declined alarmingly over the last few d

10、ecades?(3)What did Rachel Carsons book reveal?The bee population has declined alarmingly partly due to the overuse of pesticides.More then 90 per cent of the worlds farmers use artificial fertilizers and pesticides.It revealed how the pesticide DDT was causing severe damage to the environment and to

11、 humans.Answer the following questions.(1)Why do farmers use chemicals?(2)What are the disadvantages of using chemicals in farming?Chemicals not only pollute the environment,but also affect all living organisms.Because the use of chemicals brings immediate results,in terms of both plant growth and p

12、rotection.Sarah is interviewing a farmer about organic farming.Listen and finish the following exercises.BB1 Listen to the interview and choose the best answer.Circle the letters of the correct options.1 Why do organic crops taste better?a They recycle animal waste.b They reduce chemicals.c They pro

13、duce more natural,healthy compounds.2 What happens when soil microorganisms break down organic materials?a Pests are killed.b Nutrients go into the soil.c Animal habitats are safely maintained.3 How does Sarah feel about the interview?a She is glad that she has learnt a lot from the interview.b She

14、is worried that organic farming might affect crop yields.c She is grateful to Mr Zhao for his efforts at organic farming.B2 Listen to the interview again and complete the notes below.Organic farming Basic introduction Aiming to reduce farmings overall impact on the environment and improve (1)_ as we

15、ll as consumers health Focusing on(2)_ and avoiding using chemicalsfood quality recycling waste Advantages of organic farming Producing food that is chemical-free and(3)_ Trying to(4)_,not against it Disadvantages of organic farming Requiring specialized(5)_ Affecting farmers(6)_tastes better work w

16、ith nature knowledge and skills crop yieldsFocus on the description of organic farming by completing the table below.Organic farmingBasic informationAdvantagesDisadvantagesan eco-friendly practicerecycling waste as natural fertilizerbetter tasty foodworking with naturerequiring specialized knowledge

17、 and skillsaffecting the crops they produce Work in groups to discuss which method you prefer,chemical farming or organic farming.A:Do you know that over 90 per cent of the worlds farmers prefer chemical farming methods to organic ones?I think thats the right choice.Chemicals allow crops to grow fas

18、ter as they release nutrients and enrich poor soil rapidly.Chemical farming is also a more effective way to control pests compared with organic farming.As a result,the use of chemicals results in bigger harvests.B:Thats true.Organic farmers recycle animal waste into natural fertilizer and rely on na

19、tural pest control organisms to protect crops.Not using chemicals may cause organic farmers to lose more crops to diseases or pests by contrast.Yet I still think organic farming is the more attractive option as it focuses on crop quality rather than high yields.A:I see what you mean,but Im not sure.

20、Using chemicals does make farmers work easier.Organic farming,on the contrary,requires that farmers should have specialized knowledge and skills to control pests,grow crops and manage soil.B:I understand your concern.Organic farming isnt easy but its well worth the effort.A key concept of organic fa

21、rming is that it works with nature,not against it.By not using chemicals,it is eco-friendly.A:Yes,youre right.Chemicals can cause damage to water,soil and ecosystems,but the reality is that its possible to minimize the impact of chemical farming.For example,farmers can reduce the use of chemicals wi

22、th the help of precision farming.B:Thats a good point!However,as a consumer,I prefer organic farming because I want to eat good-tasting and healthy food.And its been proved that organically farmed plants produce more natural,healthy compounds and taste better.A:That makes sense.However,consumers hav

23、e to pay more for organic food.Considering the problem of world hunger and the urgent need for more food,I would still choose chemical farming.B:Well,organic farming is my first choice because its long-term benefits outweigh its short-term challenges.1.Preview Parts C and D.2.Write an article about the differences between chemical farming and organic farming in not more than 100 words.