Unit 3 Enironmental Protection Reading and Thinking ppt课件-（2022新）人教版高中英语选择性必修第三册.pptx

1、Unit 3 ENVIRONMENTAL PROTECTIONEarth provides enough to satisfy every mans needs, but not every mans greed. Mohandas K. Gandhi1. Whats happening in the photo?2. Why does it happen? Large pieces of ice are breaking off a large glacier or ice sheet. Because of global warming / the greenhouse effect /

2、rising global temperatures.Open page3. How do you understand the quote? How is it related to the theme of the unit?Earth can provide enough resources for mans survival, but can not sustain mans damage to it, due to its greed for resources, which is the root cause of environmental problems and the ba

3、sic reason for environmental protection.Earth provides enough to satisfy every mans needs, but not every mans greed. Mohandas K. Gandhi Reading and Thinking Climate Change Requires The Worlds AttentionDiscuss the climate change1 Before you read, look at the praph and the picture below and discuss th

4、ese questions in groups.1. What is the graph about? What information can you get from it? It is about the change in the Global Surface Temperatures between 1920 and 2016. It shows us that the global temperature is rising steadily and continuously.It shows us that the earth is becoming warmer and war

5、mer.Pre-reading2. Have you ever seen the photo before? What might be the story behind it?I havent seen this photo, but I have seen similar photos to it. The story behind it might be that the polar bear was struggling to find food but in vain, and starved to death.2 Read the text and answer the quest

6、ions.1. What happened to the polar bear in the photo? Why did the writer write about about it?The ploar bear died of/from starvation. The writer wrote about it to show how the increase in temperature had an impact on Earths ecology. The writer wrote about it to show one of the effects of rising temp

7、eratures due to climate change.Scanning2. Why is the “natural ”greenhouse effect important and necessary？ Because greenhouse gases in the atmosphere trap some of the heat, keeping Earths climate warm and habitable. Without this process, Earth could not sustain life.3. What are the consequences of hi

8、gh greenhouse gas emissions?More heat energy is trapped in the atmosphere, causing Earths surface temperature to rise quickly.4. Why did the author mention the climate scientists warning?To stress the seriousness of rising temperatures and the urgency to take appropriate action to deal with it.5. Wh

9、at is the authors purpose of using the graph and the photo？To inform the reader of this problem of global warming and inspire them to whatever they can to deal with it.1 Look through the text again and answer the following questions.1. Which is the genre (type of writing) of this passage ?A. news re

10、portB. narrationC. argumentationD. exposition Skimming2. In which order is the text organized? A. fact, opinion, example, ways B. problem, decision, action, result C. phenomenon, cause, effect, solution D. property, function, pattern, measures 3. What does the text mainly tell us?A. Some polar bears

11、 are becoming endangered and need the worlds attention.B. Global warming has become the worlds concern.C. The consequences of the greenhouse effect and solutions.D. Global warming has become a big problem and we must pay attention to it.4. In which part of a newspaper or magazine may we find this pa

12、ssage? A. Entertainment B. Economy C. Education D. Environment Para Topic sentenceSupporting detailsMain ideaWay of illustration1-2Evidence:1._;2. _;3. _;4._2 Read the passage again and complete the table.an example of a dead polar bearSentence 2 in Para. 1The phenomenon and evidence of global warmi

13、nglUsing a graph and a news photo; lGiving an examplea warming ocean and atmosphere; melting ice; rising sea levelsclimate changestarvationlonger food-seeking travellack of foodlow sea-ice levelsThe following reasons account for the death of the polar bear, with one influencing another. Put them in

14、a correct logical order. What is the root cause?Cause and effectPara Topic sentenceSupporting detailsMain idea Way of illustration3lThe “_ greenhouse effect”:_lThe “_ greenhouse effect” :_Sentence 1 The cause of global warming / a dramatic climate changelUsing definitionnatural man-madekeeping earth

15、 surface warm and habitabletrapping more heat energy in the atmosphere and causing Earths surface temperature to rise quicklyPara Topic sentenceSupporting detailsMain idea Way of illustration41. _:extreme _ and _;2. _:3. not only causing _ (economic losses) but also costing _(causingdeaths)Sentence

16、1 The effect of global warming/ The results of a dramatic climate changelCiting scientists opinions and giv ing an example (new reports)extreme weathernatural disastersrainstormheatwavesserious damagehuman livesPara Topic sentenceSupporting detailsMain idea Way of illustration5Government:_and_ Indiv

17、iduals: _ and _solutions to reducing greenhouse gas emissionslBy listing Sentence 2 making policies taking appropriate actions and measures restricting the amount of carbon dioxide our lifestyle produceeducate everyone about global warming, along with its causes and impactsThe greenhouse effect 3. R

18、ead the text again and create a diagram describing how the greenhouse effect works. (P27, Ex. 3) sunlight Heat released back into spaceClimate change Phenomenon & Evidence SolutionsCauses Effects governmentindividualsextreme weathernatural disastersGreenhouse effectnatural greenhouse effectman-made

19、greenhouse effectSummary1. Do you think climate change is the result of human activity? Give your reasons. (P27, Ex. 4.2) Yes, humans burn fossil fuels like coal, natural gas and oil to produce energy, along with some byproducts called greenhouse gases like carbon dioxide, methane and water vapour,

20、which trap heat from the sun and therefore warm the earth. So, the growth of the greenhouse gas, carbon dioxide in the air actually comes as a result of things we do every day and the way we produce and use energy.Post reading2. Do you think we individuals should take responsibility for dealing with

21、 climate change? What can we do? (P27, Ex. 4.3) Yes, I think we individuals can have a great effect on such environmental probems and have the power to do something to improve the environment by restricting the amount of carbon dioxide our lifestyles produce. Together, individuals can make a differe

22、nce and everyones contributions count. Here are what we can do to use less energy and lower/reduce our carbon footprint to a minimum:lUse electric appliances wisely and save water, gas and electricity.lTravel on foot, by bike or public transport.lBuy things that are economical with energy.lBuy products made from recycled materials.lRecycle materials and objects, which take a lot of energy to make.lPlant more trees and protect the forests, which absorb carbon dioxide from the air.lBe an educator about global warming, along with its causes and impacts. Homework