1、Unit4Unit4Global WarmingGlobal WarmingReadingThe Earth is Becoming Warmer-But Does It Matter?Explore the cause of global warming1Page 3Learn different attitudes towards global warming2 AimsGo through the text and think about how to divide the whole passage according to the main idea.Paragraph 1Parag
2、raphs 2&5Paragraph 6Part1Part2Part4Main idea of the textPart3Paragraph 7How has global warming come about?List two different attitudes among scientists towards global warming.The earth is becoming warmerShould we do anything?The earth is becoming warmer.How has global warming come about?List two dif
3、ferent attitudes among scientists towards global warming.Should we do anything?Part2Para 2&5Part3Para 6Part4Para 7Part1Para 1 Main idea of the textPara.1:Question:How has this global warming come about?Para.2 It is human activity that has caused this global warming rather than a random but natural p
4、henomenon.全球变暖正是人类活动导致而成的，而全球变暖正是人类活动导致而成的，而不是随意的自然现象。不是随意的自然现象。How has human activity caused this global warming?Look at the two graphs.Graph 1:Graph 2:19573151957nFrom the two graphs,can you find some relationship between them?The more CO2,the higher temperature.nWhy does more CO2 cause higher tem
5、perature?Graph 1:Graph 2:Greenhouse gases _ the heat of the sun and therefore _ the earth.It is known as _.greenhouse effecttrapwarmIs“Greenhouse effect”beneficial or harmful to us?Para.3(Line 24-36)carbon dioxideFossil Fuelcoal oil gas producenWhy is extra carbon dioxide added into the atmosphere?P
6、ara.3(Line 18-23)&Para.5nIs“global warming”beneficial or harmful to us?Does it matter?Para.6 Negative effects disappearance of speciesPositive effectsmake plants grow quicker crops will produce morea greater range of animals make life better 1.cause the sea level to rise2.severe storms3.floods4.drou
7、ghts5.famines6.the spread of diseases7.disappearance of speciesPositive effects Negative effects 1.make plants grow quicker2.crops will produce more3.a greater range of animals4.make life betterGame:Run a choo-choo trainGroup1Group2Group31.cause the sea level to rise2.severe storms3.floods4.droughts
8、5.famines6.the spread of diseases7.disappearance of speciesPositive effects Negative effects 1.make plants grow quicker2.crops will produce more3.a greater range of animals4.make life betterSearch for some more materials and think about whats your attitude towards global warming.Prepare for the debate about“Should we do something about global warming?”Assignment 谢谢 谢谢 ！
