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课件网) Reading for Writing Evaluate chemical farming and organic farming To understand the differences between chemical and organic farming and their advantages and disadvantages; To learn about the author's writing techniques; To write an essay to express your views on chemical farming or organic farming. 1.What does the farmer do in the field Spray pesticides. 2.Why does he do that To fight crop disease and increase production. 3.What else may farmer do to make crops grow Use fertilisers. artificial fertilisers natural fertilisers Lead-in Organic Farming Organic farming is simply farming without using any chemicals. Lead-in B Now, which one do you prefer A Why 1. in my eyes/ in my opinion/from my point of view My view/ opinion is that ... 2. I'd prefer ... I'd rather ... chemical farming organic farming Lead-in 1. What is the text about Chemical farming Organic farming (definition, benefit , problem... ) pictures title 2. What type of writing is it A. Narration(记叙文) B. Expository(说明文) C. Argumentation(议论文) Prediction Read for main idea What's the main idea of the text The text mainly talks about chemical farming and organic farming. _____ can cause many problems, as an alternative, some people switch to _____. Chemical farming organic farming Skimming Choose the main ideas (A-D)below with the paragraphs. A What organic farming is B Why man-made chemicals are still used in farming C Organic methods for producing rich soil D The problems with chemical farming D The problems with chemical farming A What organic farming is C Organic methods for producing rich soil B Why man-made chemicals are still used in farming Text type: Argumentation Skimming Chemical pesticides and artificial fertilizers have been in widespread use in farming since the middle of the 20th century. When they were first introduced, many farmers welcomed them as a great way to fight crop disease and increase production. Over time, however, what some scientists have found is that their long-term use can sometimes harm both the land and people’s health. For example, pesticides can damage the land by killing not only harmful bacteria and insects, but also helpful ones. In addition, these chemicals can stay in the soil and underground water sources for a long time. This affects the crops grown on the land and, in turn, the animals and humans who digest them. In fact, some pesticides like DDT have been prohibited in most countries because of the damage they cause to people and the environment. As for chemical fertilizers, crops grown with them usually grow too fast to be rich in nutrition. They may look beautiful on the outside, but inside there is usually more water than essential minerals, and they often have less flavor as well. Read part 1(para 1-2) and answer the questions. Q1: Why did many farmers welcome chemical farming Q2: What concerns many people about the long use of pesticides Q3: What role does the sente ... ...
