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1、Unit 2Task 1:【答案】June 5th, the United Nations, 1972, world leaders and citizens how to protect the en vir onment, San Fran cisco, California, Pla n the Pla net, Gree n Cities, most people now live, more tha n 75 perce nt , the former vice preside nt, music con certs, parades , tree pla ntin gs, repr
2、ese ntatives from many en vir onmen tal orga ni zati ons【原文】Every year on June fifth many coun tries celebrate World En vir onment Day. The Un ited Nati ons established this special day in nin etee n seve nty-two to get people to thi nk about tak ing care of the pla net. Faith Lapidus tells us more.
3、“ Public eve nts for World En vir onment Day are tak ing place from June first through June fifth. The eve nts and conferen ces help teach world leaders and citize ns how to protect the en vir onment.“ Every year World Environment Day is celebrated in a different city. This year it is being held in
4、San Fran cisco, California. This is the first time since the beg inning of World Environment Day that the conference is being held in the United States. The main message of World Environment Day this year is ,Plan for the Planet?. The events and conferences will show how to have ,Green Cities?. This
5、 means that people will talk about ways that cities can have healthy en vir onmen ts.“ Most people in the world lie in cities. This makes them especially important areas of en vir onmen tal concern. Cities use more tha n seve nty-five perce nt of the worlds natural resources such as water and gasoli
6、ne. World Environment Day will center on how people in cities can work together to help save the pla net.San Fran cisco is holdi ng public talks to discuss polluti on reduct ion, clea n en ergy sources and the importa nee of healthy parks and garde ns. Special experts are among the speakers. For exa
7、mple, former vice-preside nt Al Gore will talk about climate cha nge. There also are fun eve nts such as music con certs, movies, art shows, parades, bicycle rides and tree pla nti ngs. Local farmers and restaura nt owners will serve food that has bee n n aturally grow n.“ The Mayor of San Fran cisc
8、o, Ga Newsom, in vited city leaders from all over the world to atte nd this conference and share ideas. Represe ntatives from many en vir onmen tal orga ni zati ons also are atte nding. The Un ited Nati ons hopes to create an international agreement that countries and citizens will follow to help im
9、prove the Earths en vir onment. ”Task 2:【答案】A.1 d2 a3 b4 cB.1 Occupati onal no ise2 Aircraft no ise3 Traffic no ise【原文】The sense of sound is one of our most importa nt means of knowing what is going on around us. Sound has a wasted product, too, in the form of no ise. Noise has bee n called unwan te
10、d sound. Noise is grow ing and it may get much worse before it gets and better.Scien tists, for several years, have bee n study ing how no ise affects people and ani mals. They are surprised by what they have lear ned. Peace and quiet are beco ming harder to find. Noise pollution the crashing, squea
11、king, banging, hammering of people is no joke. It is a threat that should be looked at carefully. Sound is measured in units called “ decibels ” . At a level of 140 decibels people feel pain in their ears.Automobiles, trucks, buses, motorcycles, airpla nes, boats, factories, ban all these thi ngs ma
12、ke no ise. They bother not only our ears, but our minds and bodies as well. There is a saying abot it being so noisy that you can?t hear yourself think. Doctors who study noise believe that we must sometimes hear ourselves think. If we don?t we may have headaches, other aches and pains, or eve n wor
13、se men tal problems. Noise adds more tension to society that already faces eno ugh stress. But no ise is not a new problem .In an cie nt Rome, people compla ined so much about no ise that the gover nment stopped chariots from moving through the streets at ni ght!Noise can be separated into a few gen
14、 eral groups. The follow ing examples are take n from heari ngs before the US Sen ate Subcommittee on Air and Water Polluti on in 1970.Occupati onal no ise Factory workers who always hear no ise have poorer heari ng than other groups.Aircraft noise Around airports or on air routes the noise of airpl
15、anes taking off and landing causes the greatest compla in ts.Traffic noise Away from the noise of planes, traffic sounds break in on our peace and quiet. Trucks and motorcycles cause the most problems.Task 3:【答案】1 F2 F3 T4 F5 T6 F7 F8 T9 T【原文】We usually think of pollution as a harmful waste substane
16、e that threatens the air and water. But some people have become concerned about another kind of pollution. It can be everywhere, depending on the time of day. And it was not thought of as a substanee. It is light.The idea of light polluti on has developed with the in crease of lights in cities. In many areas, this light makes it difficult or impossible to observe stars and in the night sky. In 1
