1. Unit 4 Global warming Unit 4 Global warming

2. Look at the pictures and what do you know about global warming.

3. What causes the global warming? Human activity or a random but natural phenomenon? What things do we use energy for? Think about:

4. Things that use energy around us or at any other places: Where does all this energy come from?

5. From the following pictures, you will know where all this energy comes from. wind powera coal power station

6. an oil refinery a nuclear power plant

7. solar panelsa hydroelectric dam

8. Renewable or non-renewable? √

9. Renewable or non-renewable? √

10. A greenhouse

13. is made of ______ and is used for growing _______, especially during _____ weather. What is a greenhouse made of and used for? glass plants cold

14. The air inside is warm because the glass _______ the heat from the sun and keeps it from____________. This makes the greenhouse heat ____ and so the plants can grow throughout the ________ period. How does a greenhouse work? traps escaping cold up

15. Now can you connect global warming with greenhouse and think of the relationship between them? Maybe you can understand why we call global warming “greenhouse effect”.

17. What will you do every day to help reduce greenhouse gases?

18. Taking public transport like buses can reduce greenhouse gas emissions.

19. And taking train can also help a reduction of greenhouse gas.

20. The recycling symbol Buy the recycled products Recycled products

21. Recycling the bottles

22. Paper recycling Your paper could become part of a road or race-track.

23. using low-flow shower heads buying energy- efficient light bulbs replace with

24. “ 低碳生活 ” (low-carbon life) “ 低碳生活 ”(low-carbon life) ，就是指 生活作息时所耗用的能量要尽力减少， 从而减低碳，特别是二氧化碳的排放 量，从而减少对大气的污染，减缓生 态恶化，主要是从节电节气和回收三 个环节来改变生活细节。

25. Save energy! Protect the earth!

26. Homework 1.Look up the new words and expressions of the text in the dictionary. 2. Preview Reading THE EARTH IS BECOMING WARMER — BUT DOES IT MATTER?