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课件网) Unit5 Working the Land Chemical Versus Organic Farming Learning Objectives By the end of this class, you will be able to: 1.work out the content, structure and language features of the text； 2.write your opinion in an essay about chemical farming or organic farming. Pre-reading: Make a prediction Look at the picture on the left and the title of this passage, predict what will this text talk about Lead in Read the text and check whether you prediction is right or not. Chemical Versus Organic Farming While reading: Read for structure Conclusion Title Part 1: (Para 1&2) Part 2: (Para 3&4) Part 3: (Para 5) Text type: Exposition While-reading: Read for main idea Paragraph 1-2 D The problems with chemical farming Main idea： Pesticides can kill helpful bacteria and insects. Some pesticides have been prohibited because of the damage they cause. Crops grown with chemical fertilizers usually grow too fast to be full of nutrition. detail Paragraph 3 Main idea： A What organic farming is Many organic farmers use natural waste from animals as fertiliser. detail Paragraph 4 Main idea： detail C Organic methods for producing rich soil They often change the kind of crop grown in each field every year. They also plant crops that use different depths of the soil to help keep it rich. Paragraph 5 Main idea： B Why man-made chemicals are still used in farming Organic farming is nowhere near[几乎不，远非] able to meet the high demand for food around the world. detail Careful reading: Read Para.1 and answer: 1. Why did many farmers welcome the introduction of chemical farming [para1. line 2] many farmers welcomed them as a great way to fight crop disease and increase production. 2. What concerns many people about the use of pesticides [para1. line 4] Its use can sometimes harm both the land and people’s health. Fill in the table: What chemical farming is popularity in _____use in farming; many farmers _____them as a great way to.... benefits _____crop disease and _____production problems _____both the land and people’s health widespread welcomed fight increase harm Read Para.2 and answer: What is one problem with the use of chemical fertilisers [para2. line 11-12] As for chemical fertilizers, crops grown with them usually.... Fill in the table: Examples of the harm pesticides [杀虫剂] the land people’s health affect the crops in turn , affect who digest them make people ill and even cause cancer response have been _____in most countries Chemical fertilizers [化肥] crops be _____ in nutrition look beautiful more water than essential minerals less favour not only .... but also.... prohibited poor crops not taste delicious Para 3: What organic farming is definition an alternative without using ang chemicals through natural means benefits make the soil richer in minerals[矿物质]. keep.... free of chemicals How is organic farming different from chemical farming Para 4 Why do organic farmers change the ki ... ...
