新人教选修六 Unit 4 Global warming[单元课件]_4345.ppt

The effects of global warming Negative effects: 1 cause the sea level to rise; 2 severe storms; 3 droughts; 4 famine; 5 destruction of species 6 flood The effects of global warming Positive effects: 1 make plants grow faster; 2 crops will produce more; 3 make life better Coal Oil Natural gas Uranium[化]铀 (nuclear energy) Wind (wind power) Sun (solar energy) Water (hydro-electric power) Plant waste 植物性废物 (biomass energy 生物团能量 ) Hot springs or geysers 间歇泉 (geothermal energy) The sea (tidal energy 潮汐能 ) What are fossil fuels? Fossil fuels are Ancient animal and plant material below the surface of the earth with a high carbon content, such as coal, oil and natural gas, which can be burnt to produce energy. They are also known as non-renewable energy because once they are run out of /run out, they cannot be renewed. skimming Skim the text to get the main idea of the passage and each paragraph, then divide the whole passage into 4 parts and summarise the main idea of each part. Main ideas of each part True or false? 1. The temperature in the last century did not seem to increase much. 2. Everyone believes that global warming is caused by the activities of humans. 3. Janice Foster believes that she can measure the future global rise in temperature. 用法拓展(1)compare notes 交换意见(2)beyond comparison/compare 无与伦比(3)compare...to...把……比作……(4)compare...with...把……和……相比Compared with your brother, you should make greater efforts to study English.和你哥哥相比，你应该更加努力学习英语。 come about 是不及物短语。 Please tell me how the accident ___. I am still in the dark. (2005 江西) A. came by B. came out C. came to D. came about the amount of 　+　不可数名词the number of 　+　可数名词 e.g. What are you going to do with the amount of money? 9. On the one hand, Dr Foster thinks that the trend which increases the temperature by 5 degrees would be a catastrophe. ● On the one