课件25张PPT。Unit 22 Environmental ProtectionLesson1 Global Warming 北师大版高二英语模块八 1 Last year, five large islands in the Pacific Ocean have been completely drowned because of global warming.In the 21st century, the Arctic average temperature has increased by more than 1.6 ℃. Can We Take the Heat?.By 2100, the global temperature will rise by 1.4 ~ 5.8 ℃.By 2050, 20 million Bangladeshis(孟加拉国人)will be forced to leave their homes because of climate change.
Skim the text and match the headings with the paragraphs.Para 1.
Para 2.
Para 3.
Para 4.
Para 5.a. The consequences of global warming.
b. What should human beings do.
c. What is global warming.
d. Draw readers’ attention to the topic.
e. The causes of global warming. Fast-reading Careful-reading 1.Scientists have reached __________ and believe that _______________ could be one of the biggest environmental problems in the 21st century.
global warmingconsensus 2.What is global warming?
3.What should be blame for global warming?
4.What are the consequences of global warming? 5.How can we help solve the problem of global warming?Read the text and answer these questions. Global warming refers to _____________________________________________________________________________________________________________________.
Q.What is global warming?Why does the earth's temperature increase?an average increase in the Earth’s temperature that, in turn, leads to climate change. 1The Earth’s Greenhouse EffectAbout 30% the sun’s rays
bounce back into space.Most is trapped by greenhouse gases and contributes to warming
the surface and lower atmosphere.Increasing the concentration of greenhouse gases increases the warming of the surface and slows the loss of energy to space.Global warmingGreenhouse gases trapped the heat from the sun, which causes the temperature of earth goes up. The blame for global warming can mostly be ____________________ burning the fuelscutting down?forestsQ:What should be blame for global warming?
pinned on Human activities. transportagriculture industry Over the last 100 years, the temperature has increased by _____degree Fahrenheit.
Global warming and the increase of carbon dioxide is relevant. The link between human activities and rising global temperature is not merely a coincidence.1 Melting of the polar ice caps
Substantial(大量的) melting of the polar ice caps which will then lead to a rise in the sea level and subsequent(随后的) flooding of low-lying areas. Q. What are the consequences of global warming?Climate changes Global warming will also change countries’ climates and cause huge food and water shortages because of drought. hurricanedroughtheat wave Global warming leads to asthma(哮喘) or other lung diseases and causes some infectious diseases to spread.Threats to human health Threats to animalsGlobal warming will result in animals’ extinction, habitat loss and ecological imbalance. We are condemning life on Earth. Q: How can we help solve the problem of global warming?reservationssacrifice public transport, recycled less energy. DiscussionDiscuss what we can do to have a low-carbon lifestyle. Low-carbon, green travelTaking public transport CyclingWalking RecyclingRecycle paper, bottles, even old batteries and clothes. Saving energy Save water
Energy-efficient light bulbs
Turn off the power
Planting trees Raise our awareness of environmental protection.Advocating environmental protection This is our planet: planet Earth. It contains an astonishing variety of landscapes and climates. Since life began, it has gone through extraordinary changes in its climate and in the species that live on it. But now it seems that our planet is being transformed — not by natural events, but by the actions of one species: mankind. In the past, we didn't understand the effect of our actions.
But now, we do recognize the consequences
of our behavior. Now surely, we must act
to reform it: individually and collectively; nationally and internationally .—David Attenborough Conclusion HomeworkWrite a passage according to your discussion, using the title
“Save our earth, save ourselves ”
Click to edit company slogan . Thank you. Earth provides enough to satisfy every man's need, but not every man's greed.