高中英语：M4U2 chemical or organic farming课件 人教版必修4 课件VIP专享VIP免费

Chemical or Organic Farming (reading 2)Words previewWords preview chemicalchemical productionproduction bacteriabacteria pestpest nutritionnutrition mineralmineral adj. adj. 化学的；关于化学的化学的；关于化学的n. n. 生产；制造生产；制造n. n. 细菌细菌n. n. 害虫；害兽；害鸟害虫；害兽；害鸟n. n. 营养；滋养；食物营养；滋养；食物n. n. 矿物；矿石矿物；矿石 discoverydiscovery focusfocus soilsoil reducereduce rootroot n. n. 发现；发觉发现；发觉n. n. 焦点；中心点焦点；中心点vt. vt. 集中；聚焦集中；聚焦n. n. 土壤土壤vt. vt. 减少；减缩减少；减缩n. n. 根；根源根；根源Words previewWords preview skim skim underlineunderline summarysummary commentcomment vt. vt. 浏览；略读浏览；略读vt. vt. 画底线标出；强调画底线标出；强调n. n. 总结；摘要；概要总结；摘要；概要n. n. 评论；议论评论；议论vi.& vt. vi.& vt. 表达意见表达意见 ;; 做出做出评论评论Words previewWords preview In this unit we have learnt about a great man, do you still remember who he is? What is his achievement? Can you think of other ways to increase our crop harvest? What is the matter we put on the soil What is the matter we put on the soil which makes crops grow ?which makes crops grow ? It is fertilizer. It is fertilizer. chemicalchemical fertilizers fertilizers naturalnatural fertilizersfertilizers 1. What is organic farming? Farming without using chemicals. 2. What is the goal of using organic farming methods? To grow good food and avoid damaging the environment or people’s health.Long-term use of chemical fertilizers can cause damage to the land and people’s health. Farmers and customers turn to organic farming.Other methods to keep the soil fertile. Skimming Problems caused by chemical fertilizersMain ideaMain ideaP1.P2.P3.P4.II. Read the text carefully and fill in the blanks.Chemical FarmingAdvant...