1. The temperature last century didn't increase much.

2. Everyone believes that global warming is caused by the activities of humans.

3. Janice Foster believes that global warming is caused b the burning fossil fuels.

4. Natural gas is a greenhouse gas.

5. Carbon dioxide is a byproduct of burning fossil fuels.

6. People accept Charles Keeling's data because he took accurate measurements.

7. Flooding could be one of the effects of future global warming.

8. George Hambley believes scientists are just guessing about the effects of global

warming.

9. George Hambley is worried about the effects of carbon dioxide on plant growth.

10. It is clear what the effects of global warming will be.

Keys: True: 3, 5, 6, 7, and 8 False: 1, 2, 4, 9, 10

Step 4 Detailed reading

Read the text carefully and try to find out how many parts we can divide the text into and find out the main idea of each part.

Part (Para_ to Para_ )

Main idea

Part 1 (Para _1_)

introduce a debate over the issue of global warming

Part 2 (Para _2__ to _4__)

illustrate how global warming comes about

Part 3 (Para _5__ to 10___)

list two different attitudes among scientists towards global warming

Part 4 (Para _11__ to ___)

It's up to readers to think and decide whether people should do something about global warming or not.

Step 5 Debate

Get into groups of six. Decide which three in your group are going to agree with the statement and which three are going to disagree with the statement.

Group A: We shall do something about global warming.

Group B: We shall do nothing about global warming.

Group A discuss why they agree with the statement; Group B discuss why they disagree.

Group A and B get together. Tell each other the reasons why agree or disagree with the statement.

Step 6 Homework

1. Read the passage again and review the new words and expressions.

2. Prepare the debate in groups.

3. Surf the Internet for more information about global warming