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Non-renewable

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Non-renewable
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.)
…
• Where does all the energy come from?
Wind mills 风力
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a coal power
station
燃煤发电站
an oil refinery
炼油厂
a nuclear power plant 原子能发电站
Solar panels
太阳能接受器
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-renewable
Non-renewable
lights
wind
heating
Non-renewable
coal
television
Non-renewable
oil
cassette player
Non-renewable
nuclear
computer
fridge
sun(solar energy) renewable
washing machine water
(hydro-electric power) renewable
hairdryer
…
renewable
Plant waste
hot spring
renewable
negative effects of using energy
Increasing CO2
pollution
global warming
Pre-reading
Pre-reading
What 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.
Reading
The earth is becoming warmer—
but does it matter?
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While- reading
Main idea of each part
Writing techniques
Paragraph 1
raising a question
Introduce a debating over
the issue of global warming
Paragraph 2-4
giving examples,
Illustrate how global
using graphs,
warming comes about
explanation
Paragraph 5-10
List 2 different attitudes
among scientists towards GW.
Paragraph 11
give examples,
making contrast
Using a question,
whether people should do
leaving readers to
something about GW. or not. think over the issue
Homework:
Debate:
Should we do nothing
about global warming?
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