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Unit4_Global_warming课件12(新人教版选修6).ppt
Global Warming;Objectives
■ To practise using reporting verbs, e.g. warn, tell, ask, promise.
■ To practise using vocabulary related to global warming.
■ To learn about the causes of global warming and raise our awareness of protecting our globe.
■ To talk about how to help reduce greenhouse gases.;Part I;World leaders including U.S. President Barack Obama, Chinese Premier Wen Jiabao, address the general assembly(委员大会) of the United Nations Climate Change Conference 2009 in Copenhagen December 16-18, 2009. World leaders worked through the early hours to try and beat a Friday deadline for a deal on cutting emissions and helping poor countries cope with (对付) the costly impact of global warming.;;Most environmentalists agree that global warming is an unnatural phenomenon caused by the emissions from burning carbon fuels such as coal, oil and petrol; they call this the “greenhouse effect”.;The Greenhouse Effect;Raising the Earth’s temperature will cause substantial melting of the polar ice caps which will then lead to a rise in the sea level and subsequent flooding of low-lying areas.;Global warming will also change countries’ climates and cause huge food and water shortages. ;There have been several summits of governments to discuss this problem but many countries don’t want to make changes to their factories and industrial works as this would cost them money.;Which countries do you think contribute more to global warming?;Part II;1. Scan the text below for these words and work out their meanings.;condemn
reservation
sacrifice
advocate;1) The main purpose of the first paragraph is __________.
A. to introduce the topic of global warming to the readers
B. to remind the readers of human activities in the past
C. to introduce the greatest trouble in the future
D. to mention the process of global warming in history;2) Which of the following is TRUE about greenhouse gases?
A. Greenhouse gases will only do us harm.
B. Greenhouse gases do more harm than good to humans.
C. Gr
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