chemical_or_organic_farming.ppt

* Chemical Or Organic Farming? If you are a landowner, you want to grow some kinds of crops, what will you grow? will you use any fertilizer to improve the production? Do you think the chemical fertilizer will cause damage to the land, or even people’s health? Task 1 Read the first and the second paragraph, and find out the main idea of these two paragraph. Para1: para2: A new discovery of scientists. Several problems caused by using chemical fertilizers. 1 Why are chemical fertilizers so popular in farming today? 2 After the long-term use of chemical fertilizers, what have scientists found? Many farmers welcomed them as a great way to stop crop disease and increase production. Long-term use of chemical fertilizers can cause damage to the land and , even more dangerous, to people’s health. Second reading Para 1 the problems caused by using chemical fertilizers. (para 2) There are three problems.First, they can damage … as well as …. They also stay in the … and …. In addition, …grow too fast to …. green food organic food para3: para4: The advantages of using organic farming. Some methods to keep the soil fertile. Read paragraph 3, 4 What are the advantages of organic farming? The farmers focus on keeping their soil rich and free of disease and keeping the air , soil, water and crops free from chemicals. *