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选择性必修三《Unit 6 Nature in words》Developing ideas优秀ppt课件
新标准《英语》高中选择性必修第三册
Developing ideas
Activity 1
Facts about DDT:
? DDT was first produced in 1874 and was later used as pesticide.
? It stays in the environment.
? It is highly poisonous to living organism, including humans.
? Now banned in many countries, it is still used in some for malaria control.
Look at the infographic below and answer the questions.
Activity 1 Look at the infographic below and answer the questions.
1 How does DDT reach the human body in the food chain?
When DDT is sprayed onto plants in order to kill insects, it is absorbed by the plants and subsequently consumed by animals; humans in turn eat those animals. DDT also leaks through the soil and into rivers and lakes, where it contaminates fish consumed by humans.
Activity 1 Look at the infographic below and answer the questions.
2 What harm does DDT cause?
DDT is highly poisonous to living organism, including humans.
Activity 2
Read the book review on Silent Spring, a book that led to the
banning of DDT. Predict what will be mentioned in the passage.
Activity 2
Now read the passage and check your prediction.