英语必修5&选修6Unit 4 Global warming课文配套课件ppt

这是一份英语必修5&选修6Unit 4 Global warming课文配套课件ppt，共17页。PPT课件主要包含了 Windmills，Para 1，Para 2，Para 3-4，Para 4-6，go up，positive，produce等内容，欢迎下载使用。

Wind energy is used as pwer t prduce electricity .
where electricity is prduced by burning cals.
The cal pwer statins
in which il is refined and made pure.
The Oil Refineries炼油厂
a facility designed t cnvert nuclear energy int electricity.
A nuclear pwer plant
n the rf f a huse n a bright sunny day are used t cllect slar energy, making yur huse warm r heating yur water.
Slar panels
are used t keep back water and raise its level fr irrigatin r fr prducing electricity, etc.
The Hydr-electric dams
What are these buildings made f and what is their purpse?
They are made f glass and plants can grw in it when it is cld utside.
Hw des it wrk?
The glass traps the heat frm the sun, making the air warm s that plants can grw better.
Greenhuse effect!
What’s greenhuse effect?
Greenhuse gases perfrm the same functin as the glass in a greenhuse --- They trap the heat f the sun and keep the air surrunding the earth warm. Greenhuse effect may result in glbal warming.
The Earth Is Becming Warmer – But Des It Matter?
What is the cause f glbal warming?
What des greenhuse gases cnsist f?
What happened t the levels f carbn dixide ver the 100 t 150 years? Why?
What are the tw graphs abut?
Graph 1 shws the temperature rises by nearly ne degree Fahrenheit between 1860 t 2000.
Graph 2 demnstrates the increase f carbn dixide cntent in the atmsphere frm 1957 t 1997.
1. What are the different attitudes twards glbal warming?
Sme think the effects will be terrible, while sme thers believe that we shuld nt wrry abut it.
The tw different viewpints twards the effects f glbal warming between Dr. Janice Fster and Gerge Hambley
very serius
a greater range f animals
It functins as a cnclusin by asking the reader t reflect n the majr theme f the text and t predict what might happen in the future.
2. What is the purpse f the last paragraph?