(
课件网) Using Language （Reading and Writing） Unit 5 Working the Land Evaluate chemical farming or organic farming Learning Objectives Understand the differences between chemical and organic farming and their advantages and disadvantages; Learn about the structure of an argumentative essay； Write an argumentative essay to express our views on chemical farming or organic farming. Lead-in What organic means What organic means No chemical fertilisers or pesticides No genetically modified organisms Prediction Predict by analyzing the title and observing the pictures. 1. What is the farmer in the picture doing 2.What is the farmer wearing Why Spraying(喷洒) chemical pesticides on the crops. A mask and a hat. Maybe the chemical pesticides are harmful to health. Read for the structure Match the main idea with each paragraph. Para 1 Para 2 Para 3 Para 4 Para 5 What organic farming is. The problems with chemical farming. Some examples for the disadvantages of chemical farming. Organic methods to produce rich soil. Why man-made chemical fertilisers are still used in farming. Read and Think (organization ) Title The _____ and _____ of chemical farming. benefits problems Part 1: (Para 1&2) What organic farming is and _____. how it keep the soil rich Part 2: (Para 3&4) Part 3: (Para 5) Conclusion Q1.Why did many farmers welcome the introduction of chemical farming Q2.What concerns many people about the use of pesticides Q3.How is organic farming different from chemical farming Q4.Why do organic farmers change the kind of crop grown in a field every year (para.1)Because they see it as a great way to fight crop disease and increase production. (para.1-2)Their long-term use can sometimes harm both the land and people's health. (para.3)It doesn't use any chemicals. (para.4)To produce rich soil--different crops put important minerals back into the ground, making it ready for the next batch of crops. Read and answer questions Read for the content -- Read and fill Advantages Disadvantages Organic Farming fight crop disease increase production kill harmful bacteria and insects crops look beautiful outside produce richer fields healthy food-free of chemicals avoid damage to the environment or to people's health ...... harm the land and environment harm people’s health-cause cancer kill helpfel insects crops are less in nutrition less flavour cannot meet the demand for food ...... Chemical Farming How to write an argumentative essay Writing Task 近年来，媒体对“农业可持续发展” “食品安全”等问题作了一些报道，引发了许多讨论，化学种植和有机种植哪种有利于农业可持续发展并解决食品安全问题呢？请用英语写一篇议论文，表达自己的观点，并说明理由。 What other advantages and disadvantages of chemical and organic farming the author did not list Please add more. advantages disadvantages chemical organic lower costs crops look beautiful outside ecological balance food safety ecological damage food safety risks smelly gases B ... ...
