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选修9（2006年6月第1版）《Section 4： READING FOR MEANING》公开课PPT课件优质课下载
fertilizers
Pre-reading
Do you know more effects ?
Which one is good ? Which
one is bad ?
Why did the farmers welcome to use chemical fertilizers？
What is organic farming?
1.Why did the farmers welcome to use chemical
fertilizers？
2. What is organic farming?
Because chemical can stop crop disease and
increase production.
Organic farming is simply farming without
using any chemical.
1. What problems can be caused by using
chemical fertilizers?
2. What are the advantages of the organic farming ?
Read the passage and answer the following questions.
1.What problems can be caused by using chemical fertilizers?
They can damage the land by killing helpful bacteria and pets ,and by staying in the ground and underground water for a long time, They damage people's health by building up in their bodies and leading to cancer or other illnesses.
2. What are the advantages of the organic farming ?
It keeps the soil richer in minerals and so more fertile. And it also keeps the air , soil water and crops free from chemical.
Speaking
Suppose you are a seller, you want to recommend your organic product to your classmates .
Here is an example.