高中英语人教版（新课程标准）选修6【全单元教学课件】 Unit 4 Global warming

课件127张PPT。Warming upSpeaking and ListeningFrom the following pictures, you will know where all this energy comes from.windmillsa coal power stationan oil refinerya nuclear power plantsolar panelshydro-electric damListeningLi Bin is interviewing Professor Keeling about using different sources of energy. Read the statements below and tick the ones you agree with.1. Listen to Part 1 and decide which statements Professor Keeling does NOT agree with. We should stop depending on fossil fuels for our energy. 2. 90% of our energy comes from fossil fuels.Agree Agree 3. We can replace fossil fuels with cleaner sources of energy. 4. Nuclear power is a good source of energy.Disagree Disagree We should stop depending on fossil fuels for our energy. 2. 90% of our energy comes from fossil fuels. 3. We can replace fossil fuels with cleaner sources of energy. 4. Nuclear power is a good source of energy.2. Listen to Part 1 again and tick the energy sources that are mentioned. Complete the notes on them.Produce carbon dioxide cheap and concentrated form of energyclean not very practical with present technologydoes not produce carbon dioxide dangerousclean not practical: need huge areas of land to provide enough energy3. Listen to Part 2 and then list three things we can do to save energy. First we must try to find ways to use fossil fuels that does not put carbon dioxide into the air. Second we must produce products that are economical with energy. Third we must ask people to cut down on the energy they use.4. Listen to part 2 again and fill in the blanks.LI BIN: … What about _____? They don’t cut down on their use of _____.energyfactoriesKEELING: No, they don’t. However, that is a _____ we must work on as a _____ community. That means _____ and _____　countries will have to work together.problemglobaldevelopeddevelopingLI BIN: But it’s not the _____ countries that put most of the carbon _____ into the air. The developed countries are really the ones to _____.developingdioxideblameRenewable or non-renewable?Renewable or non-renewable?What is told in the picture?Sample listslightheatingcoalnon-renewableoilnon-renewabletelevision cassette player video recorder computer natural gasnon-renewable wind (wind power)renewable sun (solar energy)renewable uranium (nuclear energy)non-renewable fridgestovewashing machinehairdryerwater (hydro-electric)renewableplant waste (biomass energy)renewablehot springs or geysers (geothermal energy)renewablethe sea (tidal energy)renewableReading????????GreenhouseWhat is the greenhouse made and used for? A greenhouse is made of glass and is used for growing plants, especially during cold weather.How does it work? The air inside is warm because the glass traps the heat from the sun and keeps it from escaping. This makes the greenhouse heat up and so the plants can grow throughout the cold period.What are the “greenhouse gases”? In the atmosphere surrounding the earth there are gases called “greenhouse gases”, including carbon di ... ...