2021新版人教版选修一英语Unit5 using languagechemical vs organic farming ppt课件.pptx

1、Chemical vs Chemical vs organic farmingorganic farming All kinds of All kinds of f fertilizers ertilizers Can you think of other ways to increase our crop harvest? S Scanning canning Answer the following questions 1.What concerns many people about the use of pesticides? 1.How is organic farming diff

2、erent from chemical fertilisers? 2.What is the goal of using organic farming methods? Their long-term use can sometimes harm both the land and peoples health. Farming without using any chemicals. Farmers focus on keeping their soil rich and free of diseases through natural means. Grow good food whil

3、e avoiding damage to the environment or to peoples health Divide and summarize Part 1 : para1 & para2 Part 2 : para 3 Part 3: para 4 Part 4: para 5 The problems with chemical farming What organic farming is Organic methods for producing rich soil Why man-made chemicals are still used in farming Pest

4、icides can kill helpful_. Some pesticides have been _ because of the_. Crops grown with chemical fertilisers usually _to be full of_ bacteria and insects prohibited damage they caused grow too fast nutrition Many organic farmers use_as fertiliser natural waste from animals They often_ grown in each

5、field_ They also plant crops that use_of the soil to help keep it rich. change the kind of crop every year different depths Organic farming is nowhere near able to meet the high _ Demand for food around the world What is your opinion on What is your opinion on chemical or organic farming?chemical or organic farming? Discussion Argumentative Structure: 1.Topic (your idea) 2.Supporting evidence 3.Conclusion Show time !Show time ! Homework Homework