1、Unit 4 Global WarmingWarming up&ReadingWindmills(风车风车),renewableSource of energy:A coal power station,non-renewableAn oil refinery(精炼厂精炼厂),non-renewableA nuclear power plant,non-renewableSolar panels(太阳电池板太阳电池板),renewableA hydro-electric dam,renewableRenewable or non-renewable?Renewable or non-renew
2、able?What is global warming?What cause global warming?Greenhouse1.Have you ever seen a greenhouse?is made of glass used for growing plants,especially during cold weather.2.How does the greenhouse work?The air inside was warm because the glass traps(挡住挡住,吸收吸收)the heat from the sun and keeps it from e
3、scaping(逃跑逃跑).This makes the greenhouse heat up(热量热量上升上升)and so the plants can grow Throughout(在在期间期间)the cold period.The Earth Is Becoming Warmer But Does It Matter?Glance quickly at the magazine article1)Who wrote the magazine article?Sophie Armstrong2)What is the name of the magazine?Earth Care3)
4、Make a division of the text.Main ideas of each part:Introduce a debate over the issue of global warming.raising a questionHow global warming comes about.giving examples,using graphs,explanation List two different attitudes among scientists towards global warming.Its up to readers to think and decide
5、 whether people should do something about global warming or not.giving examples,making contrastleaving a question2._1._(2-5)How global warming comes about?the burning of fossil fuels human activityCarbon dioxideMethaneWhat are the Greenhouse gases?1.2.3.Water vaporWhat are the effects of global warm
6、ing?v a rise in the sea level v Severe storms,droughts,famines,the spread of diseases,and the disappearance of speciesv Make plants grow fasterWhat do the three scientists think about global warming?believes it is the burning of more and more fossil fuels that is resulting in a big increase in carbo
7、n dioxide.Dr.Janice FosterGeorge HambleyCharles Keelingthinks the effects of global warming could be very serious(严重的严重的).thinks global warming will be mild with few bad environmental consequences.The different ideas between Dr.Janice Foster&George HambleyDr.Janice Foster George HambleyCarbon dioxid
8、e has caused the global temperature to _.An increase of five degrees would be a _ and could be _.More carbon dioxide is a _ thing,which makes crops _ more and will encourage _.go upcatastrophevery seriouspositiveproducea greater range of animalsWhat are the two graphs about?The first graph shows the
9、 temperature increase of one degree Fahrenheit between 1860 to 2000.The second graph shows the carbon dioxide content in the atmosphere from 1957 to 1997.True or false?1.The temperature in the last century did not seem to increase much.2.Everyone believes that global warming is caused by the activit
10、ies of humans.3.Janice Foster believes that she can measure the future global rise in temperature.TTF4.The rise in carbon dioxide is causing a steady increase in global warming.5.George Hambley believes that global warming will do good rather than harm to the earth.6.It is clear what the effects of global warming will be.TTFWhat we should do to protect our earth?Discussion:1.Reduce the burning of fossil fuels 2.Plant trees 3.Use bags that can be recycled
