外研版（2019）高中英语必修第三册 Unit2_Understanding_ideas_公开课课件.pptxVIP

Unit 2 Making a differenceUndertanding ideas目录页IIVPre-readingPost-readingcontentsIIVVIFast readingLanguage pointsIIIIntensive readingHomeworkIPre-readingWater scarcity in Africa Water scarcity remains a serious issue in parts of Africa for years, especially in North Africa. In Africa, millions of people can’t get access to clean drinking water, and they are living in areas with poor sanitation services. Moreover, water availability, access and optimal use in Africa are not promising. Only 5% of Africa’s cultivated land is irrigated and less than 10% of hydropower potential is utilized for electricity generation. Pre-reading: Background Information The reasons for water scarcity in Africa are complicated.Frequent droughts due to global warming and deforestation have shrunk lakes and changed rainfall patterns.Traditional irrigation technology and agriculture have caused a good sum of water waste.Growing population and urbanization have increased the domestic and industrial water consumption, which can’t be fully supported by poor infrastructure. Pre-reading: Background Information collect and purify rainwaterfund water projects build wells and pumps recycle waste water set up facilities to purify waterdevelop new water conservation technologies Look at the map and talk about water problems in Africa.Now tick the solutions that you think are most effective to supply Africa with fresh water. Pre-readingIIFast readingRead the passage and find out what Ryan did to help solve the problem of water shortage in Africa. Ryan raised $2,000 to build a well near a primary school in Uganda, and later set up a foundation to attract more support to provide clean, safe water for people in Africa. Fast readingChoose the best explanation of the title and give your reasons. 1. The well built by Ryan solved the problem of worldwide water shortage. 2. The more wells you dig, the better the world will be. 3. The well built by Ryan encouraged more people to help make the worl