The world itself is becoming much smaller by using modern traffic and modern communication means.Life today is much easier than it was hundreds of years ago,but it has brought new problems.One of the biggest problems is pollution.To pollute means to make things dirty.Pollution comes in many ways.We see it,smell it,drink it and even hear it.

    Man has been polluting the earth.The more people,the more pollution.Many years ago,the problem was not so serious because there were not so many people.When the land was used up or the river was dirty in one place,man moved to another place.But this is no longer true.

    Man is now slowly polluting the whole world.

    Air pollution is still the most serious.It's bad for all living things in the world,but it is not the only one kind of pollution.Water pollution kills our fish and pollutes our drinking water.Noise pollution makes us angry more easily.

    Many countries are making rules to fight pollution.They stop people from burning coal in houses and factories in the city,and from putting dirty smoke into the air.Pollution by SO₂ is now the most dangerous kind of air pollution. It is caused by heavy traffic.We are sure that if there are fewer people driving,there will be less air pollution.

    The earth is our home.We must take care of it.That means keeping the land,water and air clean.And we must take care of the rise in pollution at the same time.

    Earthquake rescue robots have experienced their final tests in Beijing. Their designers say that with these robots, rescue workers will be able to have more time to save more lives during an earthquake.

    This robot looking like a helicopter（直升机）, is called the detector-bot . It's about 4 meters long, and it took about 4 years to develop the model. Its main functions（作用）are to collect information from the air, and send goods of up to 30kilos, to people stuck in an earthquake.

    This robot has a high quality 360 degree panoramic camera. It can work day and night and will also be able to send the latest pictures from the quake area. Dr. Qi Juntong, Chinese Academy of Science, said, "Unlike other automatic machines, the most important feature of this robot is that it doesn't need a distant control. We just set the information of the earthquake-struck area on it, and then it takes off, and lands by itself. It flies as high as 3,000 meters, and as fast as 100 kilometers per hour. "

This robot has a different function — it can change as the environment changes. Its main job is to search for any signs of life in places where human rescuers are unable to go.

    As well as a detector（探测器）that finds victims（遇难者）and detects poisonous gas, a camera is placed in the 40 centimeter long robot, which can work in the dark.

    Another use for the rescuers is the supply bot, with its 10-meter-long pipe. People who are caught in the ruins will be able to get supplies including oxygen and liquids.

    Experts have said that the robots will enter production, and serve as part of the national earth- quake rescue team as soon as next year.

    San Francisco has long been a favorite place for travelers who are ready to learn languages. The mild (温和的) year-round climate, shops and restaurants, bars and night life, and some of the most beautiful scenery attract many visitors to this relaxing and welcoming city. Students are sure to find the San Francisco Bay Area a fun, safe and friendly place to live and study. This is the most important.

    English School in San Francisco lies in the heart of the city. It is one of the best San Francisco English language schools. You can see views of the city from your classroom! Many buses stop less than a five-minute walk from the school, which is also just a two-minute walk from the famous Union Square, San Francisco Shopping Centre, the Financial District, Yerba Buena Gardens and the Museum of Modern Art. The school is minutes away from the cable cars (缆车) to Chinatown and Fisherman's Wharf.

    San Francisco is a great place to study English and learn about American culture, offering excellent opportunities in sports, entertainment and arts. The city borders (毗邻) excellent beaches, and you can sail or surf all year round.

    San Francisco has more restaurants than any other city in the US, and is the home of many theaters, music and dance companies, as well as museums. Just walking through many areas of San Francisco, you are certain to find something wonderful.

    Two hundred years ago the English poet William Wordsworth wrote "I wander'd Lonely as a Cloud", a poem that expresses a basic spirit of early English Romanticism.

    What makes this poem an example of Romantic thinking? It isn't just that Wordsworth chooses to write about natural scene：it is the way he describes the scene as if it had human emotions. For him, nature is not only a neutral (无感情色彩的) mixture of scenery, colours, plants, rocks, soil, water and air. It is a living force that feels joy and sadness, shares human pain and even tries to educate us human beings by showing us the beauty of life.

    Wordsworth's home, Dove Cottage, is now one of the most popular destinations in the Lake District. You can go on a tour of the garden which William planted with wild flowers and which survived in his backyard even after they disappeared from the area "He always said that if he hadn't been a poet, he would have been a wonderful scenery gardener," says Allan King of the Wordsworth Trust.

    The place near Ullswater, where Wordsworth saw the daffodils(水仙花), is at the southernmost end of the lake. The lake is wide and calm at this turning point. There's a bay where the trees have had their soil eroded(侵蚀)by lake water so that their roots are shockingly exposed. You walk along from tree to tree, hardly daring to breathe, because you are walking in the footprints of William from two centuries ago. The first group of daffodils appear, but they aren't tall yellow trumpets(小号状的花)proudly swinging in the gentle wind. They're tiny wild daffodils, most of them still green and unopened, in groups of six or seven. They're grouped around individual trees rather than collecting together.

    But as you look north, from beside a huge ancient oak, you realize this is what delighted Wordsworth: group after group of the things, spread out to left and right but coming together in your sight so that they form a beautiful, pale-yellow carpet. What you're seeing at last is nature transformed by human sight and imagination.

    Scientists in Western Australia claim to have made a new discovery—they have found gold in the leaves and twigs of trees. The researchers believe that the trees suck up the gold from deep underground, over 30 metres down. The discovery has been described as the first of its kind in the world. Australian gold exploration companies are pleased because it will make finding gold cheaper. Rather than drilling deep holes to find gold, they have more ways to examine tree leaves and branches. There is only a tiny amount of gold in the leaves. It would take 500 trees to make one gold ring. The gold is found using a special X-ray machine owned by an Australian government agency. A pure X-ray and a powerful microscope scan the leaves and branches.

    The claim that this is the first time that gold particles (微粒) have been found in living material might not be true, though. Ancient Chinese wisdom understood the connection between plants and the precious stones and minerals underneath them. They used plant life to find minerals and that was thousands of years ago. In the Zhou Dynasty, it was written in a book that a certain plant grew only near deposits of gold. Over the next 2,000 years, Chinese people wrote about different plants and how they grew, showed where minerals and precious stones such as jade, copper, lead, silver and gold were.

    Even more importantly, in the 1, 000s, Su Song described how copper, gold, silver, lead and tin were observed and taken from certain plants. These were amazing scientific discoveries. Meanwhile, this knowledge was unknown in the rest of the world until about 1, 600. This was when a British man realised that oak trees grew larger and greener where there was alum (明矾) in the ground. Maybe ancient Chinese has more knowledge to teach modern scientists.

    In Kansas City, Missouri, a computer helps firefighters. The computer, which works very fast, has information about all the 350, 000 street addresses in the city. Within two or three seconds after a call is received, the computer provides necessary information for the firefighters. The information is then sent to them by radio from the computer centre in the City Hall. The exact place of the burning building and its size, type and any other details are clear to them.

    The Kansas City computer system also has a medical record of each of the city's 900 firefighters. This kind of information is especially useful when a firefighter is injured. With the information, doctors at hospital can treat the injured firefighters more quickly and easily.

    The firefighters themselves greatly appreciate the computer's help. They know about possible danger ahead of them and can prepare for it. Many times the computer information helps to save lives and property (财产). Sometimes the lives are those of firefighters themselves.

    Mike Horan, a firefighter captain, says, "I feel as if the computer is ready to help me if I get hurt."