Unit 1 Welcome to the Unit ppt课件 --（2020版）新牛津译林版高中英语必修第三册.pptx

1、 harmsoil ecosystemoverseas region continentmillionn.&vt.伤害，损害伤害，损害n.土壤；国土，领土，土地土壤；国土，领土，土地n.生态系统生态系统adj.海外的，国外的海外的，国外的adv.在海外，向国外在海外，向国外n.地区，区域；行政区地区，区域；行政区n.大陆，陆地，洲大陆，陆地，洲num.一百万；许多，大量一百万；许多，大量Words reviewlength biodiversity species nut brazil nut lily water lily n.长，长度；时间的长短；长，长度；时间的长短；篇幅，（电影）片长篇

2、幅，（电影）片长n.生物多样性生物多样性n.(pl.species)种，物种种，物种n.坚果坚果巴西坚果巴西坚果n.百合（花）百合（花）睡莲睡莲Words reviewvariety wildlife beneath masstowering hardwood n.不同种类；变化，多样性；不同种类；变化，多样性；变种，变体变种，变体n.野生动植物，野生生物野生动植物，野生生物prep.在在下面，在下面，在下方；下方；配不上配不上n.大量；团，块，堆；一大群大量；团，块，堆；一大群adj.大批的，广泛的大批的，广泛的adj.高大的，高耸的；出色的高大的，高耸的；出色的n.阔叶树；硬材（阔叶树的木

3、材）阔叶树；硬材（阔叶树的木材）Words reviewWelcome to the Unit P1 新牛津新牛津必修必修Book 3 Unit 1 Nature in the Balance What will the Earth What will the Earth look like in 100 years?look like in 100 years?Or.it looks like this.The Earth is our only home.Leading-inListen to the song below.Discuss the following questions i

4、n pairs.What is the message of the song?What can you do to help protect the environment?Humans have done much harm to the Earth,and we have to take action to change this situation.We can use less paper and fewer plastic bottles and bags.Cutting down on electricity usage can also help reduce the air

5、pollution that power stations create.Look at the pictures and think about:What environmental problem does each picture refer to?Water pollutiondeforestationWhat environmental problem does each picture refer to?Water PollutionIt results when contaminants(污染)are introduced into the natural environment

6、.In turn,this can lead to public health problems for people living downstream(下游方向的).Water pollution is the leading主要的 worldwide全球范围的 cause of death and disease.Water pollutiondeforestationWhat environmental problem does each picture refer to?Deforestation采伐森林采伐森林Trees are cut down for use as buildi

7、ng material or sold as fuel燃料.The removal of trees without sufficient reforestation has resulted in habitat damage,biodiversity loss,and aridity干旱.Water pollutiondeforestationWhat environmental problem does each picture refer to?Global WarmingIt is the unusually rapid increase in Earths average surf

8、ace temperature over the past century.The long-term effects of global warming include further ice melt,ocean warming,sea level rise,and ocean acidification酸化.Water pollutiondeforestationWhat environmental problem does each picture refer to?Air pollutionIt may cause diseases,allergies and even death to humans;It may also cause harm to other living organisms such as animals and food crops,and may damage the natural or built environment.Let us not,however,flatter ourselves overmuch on account of our human victories over nature.For each such victory nature takes its revenge on us.Friedrich Engels