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高中英语M4U2 chemical anic farming课件 人教-课件(PPT演示稿)

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kes crops grow ? which makes crops grow ? It is fertilizer. It is fertilizer. chemical chemical fertilizers fertilizers natural natural fertilizers fertilizers 1. What anic farming? Farming without using chemicals. 2. What is the goal of anic 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 anic farming. Other methods to keep the soil fertile. Skimming Problems caused by chemical fertilizers Main idea Main idea P1. P2. P3. P4. II. Read the text carefully and fill in the blanks. Chemical Farming Advantages Stopping crop disease and increase __________ production

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