1、Environment,Our Environment,At the end of this unit, you should be able to: Interpret meaning from context Request/explain reasons Express fears/worries Criticize/respond to criticism Suggest solutions,Warm up,What do you think about the following statement about the environmental challenge we are f
2、acing now? We should be good guests on earth, neither too demanding nor disturbing its delicate balance. We should allow it to renew itself for those who are to follow.,What does environment mean to you,All the circumstances, people, things, and events around them that influence their life The parti
3、cular surroundings in which they live or exist, especially a region that has particular land, sea, or weather conditions. The natural world of land, sea, air, plants and animals that exists around towns and cities.,Activity 1 Land, Sea, and Air,Task 1 Classifying Marine: Of or relating to the sea In
4、stitutional adj.制度上的 Societal Of or relating to the structure, organization, or functioning of society. Climatic adj.气候上的 Ozone depletion,Activity 1 Land, Sea, and Air,Malaria n.疟疾, 瘴气 Agro-industrial residue残余渣 Pesticide n.杀虫剂 Task 2 Interpreting Titles Fume 1 To emit fumes.2 To feel or show resent
5、ment or vexation. (pun),Activity 1 Land, Sea, and Air,Squirrel n.松鼠 Beechwood n.山毛榉 Clutter To run or move with bustle and confusion. Vessel船； Prowl .巡游 Diminishing diminishing逐渐缩小的 Catch Something caught: 捕获物：,Activity 1 Land, Sea, and Air,Task 3 Selecting Titles Extract 1 Snub-nosed鼻子扁平的, 塌鼻的 Peri
6、l n.危险 Seminar n.研究会, 讨论发表会 Hectare n.公顷（等于1万平方米） Primeval forest adj.原始的,Activity 1 Land, Sea, and Air,Extract 2 Sustained持续的; Intensify To make intense or more intense: 增强或加强： Extract 3 Dominate To overlook from a height:俯视 Dwarf To cause to appear small by comparison:使显矮小通过比较使显得矮小：,Activity 1 Lan
7、d, Sea, and Air,Rugby 拉格比市 Cement 水泥 Stack A group of chimneys arranged together. 一排烟囱排列在一起的一群烟囱 Emission air pollution emission 空气污染排放(物) Dispute To argue about; debate. 就进行争论；辩论,Activity 1 Land, Sea, and Air,Inhale To draw (air or smoke, for example) into the lungs by breathing; inspire.吸入通过呼吸吸进（如
8、空气或烟） 肺内；吸气 Coke焦（炭） Extract 4 Muggy Warm and extremely humid.湿热的温暖且十分潮湿的,Activity 1 Land, Sea, and Air,Swelter To suffer from oppressive heat. 热得难受，中暑 Nudge 接近 put on the alert (军队)处于戒备状态 Home-brewed 自家酿造的 Extract 5 Luftwaffe n.(纳粹时代的)德国空军,Activity 2 Waste,In recent years, with the development of o
9、ur economy more and more environmental problems have arisen. Many of us have noticed that pollution of various kinds is a serious problem in our society. Task 1 your experience of pollution problems around you Air, water, soil and noise pollution,Activity 2 Waste,Task 2 listening practice Words from
10、 the tapescripts Rubbish dump Adore To like very much: Stallholder n. 1.摊贩 Returnable adj.可退回的 Reservoir litter,Activity 2 Waste,Polythene 化聚乙烯 Purchase Polystyrene n.聚苯乙烯 Synthetic adj.合成的, 人造的, Biodegradable adj.生物所能分解的 Decompose v.分解, (使)腐烂,Activity 3 Ecological Disaster,Task 1 Distinguishing Typ
11、es of Text NATION FACING ECOLOGICAL DISASTER Pre-reading activity What kinds of ecological problems do you think China is facing now? Words and phrases Proportionate成比例的,Symposium n.讨论会, 座谈会 Waterway 航道可航行之水体，如河流、海峡或运河potable Fit to drink. Stench A strong, foul odor; a stink. Excrement Waste materia
12、l Sewerage n.排水设备, 污水 Ration 定量配给,Chinas ecological problems are proportionate with the countrys giant size.(the ecological problems are very serious in China.),Tropical rainforest,A tropical rainforest consists mainly of tall broad-leaved, evergreen trees. Its a warm, wet place with no seasons-just
13、 a constant climate of high temperatures and heavy rain. These conditions produce humidity which encourages such a rich variety of plants and wildlife that its the most diverse habitat in the world.,Clearing the rainforest,Tropical rainforests are under threat in most parts of the world. Huge areas
14、are cut down for timber, or cleared for hydro-electric dam projects and mining. Once developers have built roads into the forests, settlers move in to clear more areas for farmland. Large clearings are made by burning trees, which releases huge quantities of smoke and carbon dioxide. This upsets the
15、 delicate,Clearing the rainforest,Balance of the Earths atmosphere, and leads to global warmingthe so-called greenhouse effect. The forest can re-establish itself in small clearings but large ones are never reclaimed. When whole areas have been cut down, the land becomes arid, like a desert.,Greenho
16、use Effect,Factories, farms, cars and many other things pump gases into the air. Some of these trap so much of the Suns heat that the Earth is warming up like a giant greenhouse. It is caused by certain gases in the atmosphere, particularly carbon dioxide, which act like the glass in a greenhouse. L
17、ike glass, these gases let through visible light from the Suns radiation to warm the,Greenhouse Effect,The ground. But, also like glass, they trap invisible infra-red radiation (heat) from the Earth that would otherwise escape back into space. Without this effect, Earth would be 30 centigrade coder
18、on average, and life would be impossible.,Greenhouse Effect,Natural systems have kept levels of carbon dioxide so steady that the Earths temperature has nearly always been just right. But since the Industrial Revolution began some 200 years ago, levels have been rising. Over 80% of the extra carbon
19、dioxide comes from burning fossil fuelsoil, gas and coal- in factories, power stations,Greenhouse Effect,Transportation and homes. The rest comes from destroying forests. Trees use up the gas when alive, but release it when they are felled and burned.,Disappearing rainforests,As area of rainforest a
20、bout the size of Ireland may be lost each year. Many trees are cut and set alight(slash and burn) to make farmland for crops and cattle. The ash fertilizes the soil, but the goodness lasts only a couple of seasons before the farmers have to move on. When the forest is cleared it leaves the fragile soil unprotected. Its nutrients are quickly eroded by wind, and heavy rain washes(leaches)them away.,
