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Unit6 Global warming. Can you tell what we use energy for? Energy lights our cities Energy heats our buildings Energy entertains us ( watching TV; playing computer etc.) …. Wind mills. 风力. Where does all the energy come from?. 更多资源 xiti123.taobao.com. a coal power station. 燃煤发电站. - PowerPoint PPT Presentation
Unit6 Unit6 Global warming Global warming
Can you tell what we use energy for?
Energy lights our cities
Energy heats our buildings
Energy entertains us
( watching TV; playing computer etc.)
• Where does all the energy come from?
Wind mills 风力
a coal power station
an oil refinery 炼油厂
a nuclear power plant 原子能发电站
a hydro dam 水坝
What’s the difference between wind power and coal power?
Wind will never run out while coal is a limited source.
What is renewable energy and what is non-renewable energy?
Try to tell as many as possible
Things that use energy
Sources of energy Renewable/
Non-renewablelightsheatingtelevisioncassette playercomputerfridgewashing machinehairdryer…
Plant waste renewable
hot spring renewable
negative effects of using energy
Increasing CO2 pollution
Pre-readingWhat is it in the picture?It’s a greenhouse made of glass.What is it used for?It’s used for growing plants, especially during
cold weather.How does it work? The air inside is warm because the glass traps
the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.
What is greenhouse gases?
The gases surrounding the earth, including carbon dioxide, methane and water vapor.
What do you think greenhouse gases do?
They trap heat from the sun and therefore warm the earth.
The earth is becoming warmer— but does it matter?
Main idea of each part Writing techniquesWhile- reading
Paragraph 1Introduce a debating overthe issue of global warming
Paragraph 2-4Illustrate how global warming comes about
Paragraph 5-10List 2 different attitudes among scientists towards GW.
Paragraph 11whether people should do something about GW. or not.
raising a question
giving examples,using graphs, explanation
give examples, making contrast
Using a question, leaving readers to think over the issue
Should we do nothing about global warming?