Unit4_Global_warming课件36新人教版选修6）.ppt

Module 6 Unit 4 Warming-up and Reading ;;stove;Find out the related energy;a coal power station / coal;oil refinery(炼油厂) / oil;nuclear power plant(工厂) / nuclear;solar panels(太阳能电池板) / solar power;a hydro-electric dam (水力发电大坝) / water;non-renewable;Renewable or non-renewable?;Renewable or non-renewable?;Carbon dioxide;Video watching;Skimming; The first paragraph is in bold(粗体), which once again introduces _________________________________. ;Skimming;Skimming;Skimming;Skimming;Scanning;A greenhouse;traps the heat from the sun; Greenhouse effect is a natural p . Greenhouse gases in the atmosphere can warm the earth by trapping heat energy. But the problem begins when we add huge q of extra carbon dioxide to the atmosphere by burning fossil f . Therefore, more heat energy is t in the atmosphere. It is the increased amount of carbon dioxide that is r in global warming.;Tip: You can know somebody’s opinion through understanding his or what he said. ;Dr. Janice Foster thinks the effects of global warming could be very serious. George Hambley thinks global warming will be mild with few bad environmental consequences. ; Dr. Janice Foster;2. Does global warming matter?;cause the sea level to rise severe storms droughts famines the spread of diseases destruction of species;;cause the sea level to rise severe storms droughts famines the spread of diseases destruction of species;Idea-sharing; ;1.The temperature last century didn’t increase much. 2.Everyone believes that global warming is caused by the activities of humans. 3.Janice Foster believes that global warming is caused by burning fossil fuels.;4.Natural gas is a greenhouse gas. 5.Carbon dioxide is a byproduct of burning fossil fuels.;7.Flooding could be one of the effects of future global warming. 8.George Hambley believes scientists are just guessing about the effects of global warming. 9.George Hambley is worried ab