英语2017届chemicalororganicfarming.ppt

Tt 吃动物怕激素； 吃植物怕毒素； 喝饮料怕色素； 能吃什么， 心里没数。 ---某人大代表 吃植物怕毒素； pests pesticide 杀虫剂 poisonous chemicals to get rid of contains Chemical Farming or Organic Farming ? Predict : What may be talked about in the passage? Para 4 Para 1 Para 2 Para 3 Main idea of each paragraph the popular use and harmful effect of _________________ Para 4 Para 1 Para 2 Para 3 Main idea of each paragraph chemical fertilizers harmful effect …, however, ……………… ________ caused by chemical fertilizers Main idea of each paragraph problems How many problems? Which problem do you think is the most dangerous? the popular use and harmful effect of _________________ Para 4 Para 1 Para 2 Para 3 chemical fertilizers harmful effect ________ caused by chemical fertilizers organic farming and its ________ Main idea of each paragraph problems benefits Why does the writer mention “using natural waste from animals as fertilizer”? the popular use and harmful effect of _________________ Para 4 Para 1 Para 2 Para 3 chemical fertilizers harmful effect ________ caused by chemical fertilizers organic farming and its ________ ___________ of organic farming Main idea of each paragraph problems benefits other methods the popular use and harmful effect of _________________ Para 4 Para 1 Para 2 Para 3 chemical fertilizers harmful effect 轮种 套种 change the kind of crop in each field every few years plant crops together to use different levels of soil ___________ of organic farming Para 4 other methods ________ caused by chemical fertilizers organic farming and its ________ Main idea of each paragraph problems benefits Chemical or Organic Farming? ___________ of organic farming other methods the popular use and harmful effect of _________________ Para 4 Para 1 Para 2 Para 3 chemical fertilizers harmful effect Summarize: What is the purpose of this passage? Chemical Farming or Org