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1、1Uint2 Our globe is in danger! I.Lead in Task 1: sandstorm ; air pollution ; deforestation water pollution ; melting polar ice cap ; light pollution drought ; desertification ; littering II. Basic Listening Practice Keys: 1.B 2.D 3. A 4.A 5.C III. Listening In Task 1:We should have proper respect fo
2、r nature! Script: Martha:Do you think most people in your culture respect nature? Ed:I think so. Um. more now than before. Martha:What do you think is the most serious environmental problem in the world today? Ed: Today. I think damage to the ozone layer is a big problem, and another problem is poll
3、ution in big cities and things like that. Martha: How do you learn about environmental problems? Ed: Um. through school. A lot of clubs promote environmental safety, and some TV programs, too. They talk about environmental safety and stuff like that. Martha: Do you think students should learn more a
4、bout the environment at school? Ed: I think so. So, as they grow older, they can be more aware of all the problems that are going on, and also to prevent more problems from occurring. Martha: If you could create a new law to help the environment, what would it be? Ed: A new law for the environment?
5、Um. Id probably say that when people throw away their cigarette butts, they have to throw them into the garbage bin, not just throw them everywhere because its just littering and I hate that. So they should be fined if they throw them on the floor or on the ground. Martha: Thats a good idea. What do
6、 you personally do to help protect the environment? Ed: Im so against littering. I never litter. If I see somebody litter, I get really angry. So I always throw my trash into the garbage bin. Keys: (1)nature (2)environmental problem (3)pollution (4)promote (5)aware of (6)from occurring (7)law (8)thr
7、ow away (9)fined (10)trash 2Task 2:River pollution Script: If you see dead fish floating on the river or notice that the water is discolored and smelly, you know the river has been polluted, and there are four main possible causes for it. First, fertilizer. If large amounts of fertilizer or farm was
8、te drain into a river, the concentrations of nitrate and phosphate in the water increase considerably.Algae use these substances to grow rapidly, turning the water green. This massive growth of algae leads to pollution. When the algae die, they are broken down by the action of the bacteria, which qu
9、ickly multiply, using up all the oxygen in the water and therefore causing the death of fish. Second, industrial waste. Factories sometimes discharge chemical waste into rivers. Examples of such pollutants include cyanide, lead, copper, and mercury. These substances may enter the water in such high
10、concentrations that fish and other animals are killed immediately. Sometimes the pollutants enter the food chain and accumulate until they reach toxic levels, eventually killing fish and other animals. Third, oil pollution. If oil enters a slow-moving river, it forms a rainbow-colored film over the
11、entire surface, preventing oxygen from entering the water. Fourth, warm water. Industry often uses water for cooling processes, sometimes discharging large quantities of warm water back into rivers. A higher temperature of the water lowers the level of dissolved oxygen and upsets the balance of life
12、 in the water. Keys:1.D 2.A 3.B 4.C 5.D Task3: Curbing carbon emissions Script: Although it is not an easy task, China is striving to fulfill the promise to cut its carbon dioxide emissions per unit of GDP by 40 to 45 percent in the next 10 years. Zhang Guobao, Director of the National Energy Admini
13、stration, said, “The government puts great emphasis on seeking harmonious development between cities and the environment, and is readjusting the energy structure by giving priority to the development of clean and low-carbon energies, including hydroelectric, nuclear, wind, and solar power.“ Governme
14、nt authorities have closed small, coal-fired plants with a total capacity of 60.06 million kilowatts in the past four years. This years target of closing 10 million kilowatts of capacity will be achieved by August. “We have promised to the international community that 15 percent of our power will be
15、 generated from nonfossil sources by 2020,“ Director Zhang said. At present, non- fossil energy accounts for only 7.8 percent. China is making efforts to increase the proportion of clean energy in its total energy consumption. Statistics show that China invested US$34.6 billion in clean energy last
16、year, exceeding the United States which invested US$18.6 billion. Thus, China has become the world leader in generating clean energy. Five years earlier, Chinas investment in clean energy was only US$2.5 billion.3However, Chinas carbon emission reduction target cannot be achieved easily. The shift to a low-carbon economy might be met at a cost to society. For instance, more than 400,000 people were laid off as a re
