新课标_高中英语选修6第四单元阅读课件

this increase in carbon dioxide. 2. How high will the temperature increase go? Dr Janice Foster says that the amount of
warming could be as low as 1 to 1.5 degree Celsius, but it could be as high as 5 degrees.
methane carbon dioxide water vapor
In the atmosphere surrounding the earth there are gases, which are called “greenhouse gases”.
Fossil Fuel(矿物燃料)
coal
produce
oil
carbon dioxide
gas
●●●●●●
global warming

What do you think greenhouse gases do?
Greenhouse gases _t_r_a_p_
the heat of the sun and

Skimming
What are the names of the three scientists mentioned in the article?
Dr Janice Foster, Charles Keeling, George Hambley

therefore w__a_r_m__ the earth.
It is known as
_g_r_e_e_n_h__o_u_s_e__e_ff_e_c_t_.
Nowadays our earth is becoming
_w_a_r_m__e__r_a_n__d__w_a__r_m__e_r.
Skimming ★ ★
Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental consequences.
greenhouse / glass
Turn to Pre-reading 1,
③What’s the use? Page 25.
A greenhouse is used
for_g_r_o_w_i_n_g__p_Rla__ne_tas, d & answer.
especially during _co_l_d_ weather.

Para.3 1.How do human affect the earth warming up?
It is due to the burning of fossil fuels like coal, natural gas and oil to produce energy. 2. What is greenhouse gases? Greenhouse gases are some byproducts of the process of producing energy, the most important one of which is carbon dioxide.

Para.2
1.What conclusion can you make from the Graph1?
The earth is becoming warmer. 2.Who is to blame for the earth’s becoming
warmer? It is human activity that has caused this global warming rather than a random but natural phenomenon.
• Plant waste (biomass energy)
• Hot springs or geysers (geothermal energy)
• The sea (tidal energy)
① What are they? ② What are these buildings made of?
How does a greenhouse work?
_tr_a_p__s the heat from the sun
keeps it from _e_s_c_a_p__in_g_
h_e_a_t_s the air up
trap…from…: keep sth in a place
存住来自…的…
www.themegallerLeabharlann
Para.1 1. How much did the temperature of the earth rise during the 20th century? About one degree Fahrenheit. 2. What is the question of Sophie Armstrong? So how has this come about and does it matter?

4. What kind of problem does it begin when huge quantities of extra carbon dioxide into the atmosphere?
It means that more heat energy tends to be trapped in the atmosphere causing the global temperature to go up.

Does global warming matter?
Negative effects Positive effects

Negative effects
1. cause the sea level to rise
2. severe storms 3. floods 4. droughts 5. famines 6. the spread of
diseases 7. disappearance of
species
Positive effects
1. make plants grow quicker
2. crops will produce more
3. a greater range of animals
4. make life better

3. What is 'greenhouse effect'? It is a natural phenomenon which happens when small amounts of gases in the atmosphere, like carbon dioxide, methane and water vapour, trap heat from the sun and therefore warm the earth.
Things that consume energy
computer light/TV/water dispenser refrigerator
hairdryer
car
video player
washing machine
oil
natural gas
energy sources
nuclear energy
diseases 7. disappearance of
species
Positive effects
Negative effects
1. cause the sea level to rise
2. severe storms 3. floods 4. droughts 5. famines 6. the spread of

Para.4
1. What conclusion can you get from Graph2?
The levels of carbon dioxide have increased greatly over the last 100 to 150 years.
Who wrote the article? Sophie Armstrong
What is the name of the magazine? Earth Care
Tip: In English, some nouns begin with a capital letter(大写字母), such as names of people and places, titles of magazines, newspapers, stories and books, people’s titles(头衔), etc..
wave / tidal energy
Non-renewable Renewable
• Coal • Oil • Natural gas • Uranium (nuclear energy)
Fossil fuels
• Wind (wind power)
• Sun (solar energy)
• Water (hydroelectric power)
parts per million.

Para.5
1. Do the scientists accept the data? They accept the data and agree that it is the buring of fossil fuels that had resulted in