课件60张PPT。Welcome to the unitUnit2 The EnvironmentenvironmentpeacefulcleanhealthygreenbeautifulWhy is the earth crying ?environmental problemsEarthrubbishsmokedeforestationforest firesandstormwater pollutionRubbish1.What kind of rubbish do you usually find?
2.What effect does rubbish have on our daily life?
3.What has caused so much rubbish? How can we
solve this problem?Make the environment ugly, dirty and even dangerous. Cause diseases.Throw rubbish in the streets or in nature. Buy products that use too much packaging(包装).Throw waste in rubbish bins.
Buy products that use less packaging. Recycle as much as possible.Air pollution causes more than 2.7 million deaths in the world every day. 1.Where does smoke come from?
2.Suppose the factory is in your neighborhood,
how do you think the smoke will affect you?
3.Is there any way to deal with air pollution?smokeMake people get sick or even die. Make the environment dirty.
Cause acid rain (酸雨). Factories, power stations(发电站), cars, air conditioners give off waste gas. Burn coal and oil. The harmful smoke should be made harmless before it goes into the air. Ride bikes more. Limit the number of cars./Make cars that don’t pollute the air.deforestation1.What can you see in the picture?2.What will happen if we continue cutting down so many trees? Cause bad weather (sandstorm).
Lands or mountains turn into desert. Cause starvation(饥饿).Rich surface soil will be blown away by wind or washed by rain down to hills and into rivers.Desertification
沙漠化DeforestationDesertificationUse less wood. Plant more new trees. Try to make desert areas become green land.What can we do to prevent this from happening?Forest fire 1.What might be the reasons for the terrible forest
fire in the picture?
2.Who should take the responsibility(责任) of
taking good care of the forest?
3.Do you think the forest plays an important part
in balancing nature?Sandstorm1.Have you ever experienced any
sandstorms or have you ever seen
some on TV?2.What measures has our government
taken to better our environment?Water pollutionWater pollutionIt is estimated that over 1 billion people—about one fifth of the world’s population —don’t have enough safe drinking water. Many people don’t have enough clean drinking water. Make people get sick.Factories pour waste into rivers/ lakes/seas. People throw rubbish into rivers/lakes.Use new technology to make sure that factories are green and clean. Clean the water in the rivers/lakes. Save water in our daily life.Which problems are caused by nature?rubbishsmokedeforestationforest firestandstormwater pollutionforest firesandstormearthquakeTsunami海啸
Seaquake海震
Typhoon台风
Hurricane飓风
Flood
Drought
干旱Snowslide
雪崩Tornado龙卷风Volcano
eruptionNatural
disastersearthquake On July 28th, 1976, at 3:42 a.m. local time, a powerful earthquake took place in northeastern China about 95 miles east of Beijing near Tang Shan, an industrial city of about 1 million people. More about Tang Shan earthquakeMany eye witnesses said they saw a bright flash across the sky which was followed by a deafening震耳欲聋的 roar吼叫 just before the shaking began. Remains of PompeiiWhat caused the destruction of the city of Pompeii?Mount Vesuvius erupted and lava, ash and rocks poured out of it onto the surrounding countryside. All the people in Pompeii were buried alive, and so was the city.typhoon
Hurricane
tornadosnow slideflood and drought tsunamiBefore tsunamiAfter tsunamiEl Nino Global warmingExplosion爆炸 of mineswarRadiation射线starvationFactitious
(人为的)
damageLeak泄漏 of gas/oil/
Nuclear核Remains of LoulanWhat caused the city of Loulan to disappear?It was gradually covered over by sandstorms from AD 200 to AD 500.Almost 800 million people in the world do not have enough to eat. starvationwarExplosion of mines用钢筋混凝土封起来的曾经发生核泄露的切尔诺贝利核电站4号机组 1986年4月26日，前苏联（现乌克兰境内）的切尔诺贝利核电站4号机组发生爆炸，8吨多强辐射物质倾泻而出，使5万多平方公里的土地受到污染，320多万人遭受核辐射的侵害。 Leak of nuclear核泄漏Leak of oilApril 22ndWhat can we do to solve the problem? As a student, what can you do to reduce pollution and protect our environment? Discuss with your partners and write down the things you can do.
Divide the class into two groups. The group which has more ideas will be the winner.CompetitionGROUP A:GROUP B:rubbishplate××basketclean↖↘↙Pass lawsPlant treesApril 22ndEarthdayControl sandWhat can we do? Write down what you will do to protect our environment.
Exchange your ideas with your classmates.HomeworkGood-byeThank you
