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1、 Several years ago, a people said: Maybe cars are the worst invention of people. More and more people believe that today. As a matter of fact, we do not know what is happiness and what is we really want about cars. Today, millions of cars run on the earth, we must construct our cities for them, and
2、we walk and follow them with heavy breath. What a shame! We nearly had thrown ourselves under wheels. We must meditate that, and meditate that.1. Cars and our cities.Nowadays, we nearly could not live without cars. The number of cars increased quickly as increase of the number of population. Accordi
3、ng to the statistic, there are about 24 million mobile cars in China, and 1.2 million of them are home cars. Most of them are in cities, and the number increases by 5 million every year. Experts predicted there will be 60 million cars in China in 2010. Some people said: There only two kinds of anima
4、ls in cities, one is people, the other is car. The number of cars increased quickly. The city became a sea of cars. Cars share the world with us. In other words, snatch our live space. So more and more people in cities struggle to retake their live space. There are some contradictions between cars a
5、nd people in cities. I will show them to you. Cars and traffic.The result of cars increase is traffic stoppage, traffic stoppage slows the speed of economic development, and increases the cost of transportation. Consequently, the productivity decreases. The cities will lose their status that had bee
6、n heartlands and their economy will be broken.For example, the traffic stoppage could decrease the buses efficiency. According to a surrey, if 500 buses in a city decelerated by 1kilometre/hour, it means that this city lost 150 buses transport power. In other words, the government must invest more t
7、han 150 buses in public traffic to recover the transport of the city. But if do that, the traffic will be much more harder. And if the cars density increase to 1.5 times, the noise from cars could increase 3 DB. On this condition, the proceeds of cars in China had exceeded RMB 1000 billion yuan. Acc
8、ording to the surrey, 90% of roads of Beijing which citys population is 2 million is saturated. 99 big intersections in Beijing are in traffic stoppage every day. Roads are urgent, parking lots are urgent, only cars are not urgent, they are peoples favorites.10 years ago, a sociologist Zheng Ye publ
9、ished his dissertation Criticism of Cars Civilization. He said: Cars did not accelerate traffic speed, but they polluted cities. The parking lots for them ate our parks, the expansion of road for them conquers our theatres, museums and grass. They broke the quiet of suburbs. Cars and environment.Mos
10、t cars are in big cities, especially in China, so the contaminant in air of these cities is more than the cities in developed countries. Always the energy of cars is petrol Surrey shows that 74% of nitrogen and oxide in air is from cars in London 1990s. It contains CO, CO2, NOx, HC, DM, SO2, and so
11、on. The end gas from cars not only pollute air but also produce more chemical smog to shut our eyes. The HC and NO in the end gas react with each other and release ozone, formaldehyde and peroxide, which is the kingpin of chemical smog. The smog wrap edifices and people breath hardly.The oil which b
12、lazes partially in engines releases HC, it contains hydrocarbon, formaldehyde, and so on. It hurts peoples eyes, larynges, and tracheas. Some kinds of compound above are poison and carcinogenic.CO2 is a kind of gas which could result in the moisture of the world increase. It is terrible for circumst
13、ances. So 55 countries had signed The treaty of controlling the discharge of CO2 in Tokyo 1997.CO is a kind of produce of engine. A few carbon atoms in the oil oxidize and become CO2 and CO. CO is mild and colorless, it can brook peoples blood system of people, and it is mortal the people whose hear
14、t is unhealthy. Excess CO can asphyxiate people, so someone had been killed by CO in the airtight garages or cars.Nitrogen and oxygen react with each other and release their compound. We call it NOx which is the cause of acid rain.Additionally, the lead in oil is a terrorist to health of people.Euro
15、pe is the birthplace of industrial revolution. The people here had suffered air pollution in 19th century, especially in 1952. Strong smog had wraped all the buildings of London and had stay here for 5 days. 3000-4000people were killed by the smog. I will show some examples of smog disasters.1873, 1
16、150 people were killed by chemical smog in UK.1909, 1000 people were killed by smog in Scotland.1930, 63 people were killed in Meuse.1948, 20 people were killed in the USA.1950, 22 people were killed in Poza Rica.1953, 170-260 people killed in New York.1954, because of smog, hundreds of factories and schools closed up in Los Angeles.1956, 1000 people were killed in London.1962, 750 people were killed in London.1965, 80 people were killed in New York.In western countr
