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(12)classic (13)part-time (14)growing (15)two-year
Uint2
I.Lead in Task 1:
sandstorm ; air pollution ; deforestation
water pollution ; melting polar ice cap ; light pollution
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Our globe is in danger!
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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 for nature! Keys: (1)nature
(2)environmental problem (3)pollution (4)promote (5)aware of (6)from occurring (7)law (8)throw away (9)fined (10)trash
Task 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
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causes for it.
First, fertilizer. If large amounts of fertilizer or farm waste 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 quickly 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 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 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 in the water. Keys:1.D 2.A 3.B 4.C 5.D
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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 Administration, said, \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.\
Government authorities have closed small, coal-fired plants with a total capacity of 60.06 million kilowatts in the past four years. This year's target of closing 10 million kilowatts of capacity will be achieved by August.
\power will be generated from nonfossil sources by 2020,\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 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, China's investment in clean energy was only US$2.5 billion. However, China's carbon emission reduction target cannot be achieved easily.
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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 result of the shutdown of small coal-fired power plants in the past four years. Many studies indicate that the effort to curb greenhouse gas emissions may delay China's development, affect people's income, and lead to unemployment. Keys:1.D 2.D 3.A 4.B 5.C IV. Speaking Out MODEL1
(1)getting along during this unusually hot weather. (2)the hot, humid weather is killing her. (3)does bring global warming and rain.
(4)Everybody should know what causes global warming. Otherwise we won’t stop it.
(5)not to burn any more wood or coal (6)the polar ice caps melt and oceans rise. MODEL2
(1)asking for donations to save the rainforests. (2)They need hot, tropical climates. (3)heavy rainfall leads to dense vegetation.
(4)plant and animal species exist only in rainforests. (5)are in danger of destruction by (6)find a way to save them
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