Unit 3 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、unit3 Environmental protection Reading and thinkingHewen新词相知meltrelease habitablesustaintrendemissionhave an impact on/upon对有影响take. . .actions to do sth.采取行动做某事refer to参考be trapped in陷入新词相知along with连同一起result in 导致be responsible for 对负责任in search of 搜查in response to 作为.答复lead to 导致Think and talkdr

2、oughtfloodThink and talkheat wavemelting iceheat waveThese are the environmental problems we face.Think and talkThe polar bear in the photo died of starvation.Read and matchIt is about the reasons for global warming and the impact on Earth.Read and choose1. According to the passage, whats the main r

3、eason for global warming? A. Burning fossil fuels. B. Human activities. C. Too much carbon dioxide. D. The heat from the sun. Read and choose2. Where does this article most probably come from? A. A magazine. B. A handbook. C. An advertisement. D. A notice. Read para3 and draw a diagram(图表图表) to expl

4、ain the greenhouse effect.As we know, global warming is affecting our Earth 1. _(serious). What is causing the increase in the global surface temperature? Everyone believes greenhouse effect is the main reason 2. _ global warming. In the atmosphere there are some greenhouse gases 3. _(keep) Earths c

5、limate warm. This is the natural greenhouse effect, 4. _ helps Earth sustain life. However, people produce 5. _ huge amount of extra greenhouse gases by burning fossil fuels. Such gases can trap 6. _(much) heat energy in the atmosphere and make Earth warmer.Post-reading: fill in the blankseriouslyfo

6、rkeepingwhichamoreThis 7. _ (call) man-made greenhouse effect. Global warming has led to an increase in extreme weather and 8. _ (nature) disasters worldwide, such as rainstorms and heat-waves causing many 9. _ (die) and economic losses. Therefore, governments should take appropriate actions and mea

7、sures 10. _(reduce) greenhouse gas emissions. And we as individuals must do our best to change our lifestyles to reduce our “carbon footprint”. Post-reading: fill in the blankis callednaturaldeathsto reduceThink and discussGlobal warming will result in more frequent extreme weather and disasters. Wh

8、at examples do you know? Make a list. What should we do to slow the progress of global warming?Think and discussgovernmentindividualIntroduce strict carbon emission policies.Produce cars using new clean energy.Drive less.Turn off lights when leaving a room. Read and recite1. There is little doubt th

9、at Earth is getting warmer and warmer. 2. A warming ocean and atmosphere along with melting ice and rising sea levels provide evidence of a dramatic change in the global climate. 3. An expert who has studied polar bears for many years said that from the position of its dead body, the bear appeared t

10、o have starved and died. 4. Experts claimed that low sea-ice levels caused by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food. Read and recite5.The “natural” greenhouse effect refers to the fact that heat from the sun enters t

11、he atmosphere and warms Earths surface as short-wave radiation. 6. Greenhouse gases in the atmosphere, such as methane and carbon dioxide, trap some of the heat, keeping Earths climate warm and habitable. 7. There is strong and comprehensive evidence that the rise in temperature has led to an increase in extreme weather and natural disasters worldwide, not only causing serious damage, but also costing human lives. 8. We as individuals can also reduce our “carbon footprint” by restricting the amount of carbon dioxide our lifestyles produce.