our lives. Americans, for example, have to cut down on the number of their total are encouraged to use bicycles, which are thought to help keep the air clean.
But this change does not come easily. A large number of workers may find themselves without jobs if a car factory cioses down. Thus the problem of air pollution would become less important than that of unemployment. Although cars have led us to a better life, they have also brought us new problems.
Cars have created a lot of serious problems in our world. All the time, they are pumping huge amounts of waste gases into the atmosphere, causing disease and even death.
One possible solution is to design and develop clean cars and clean fuels. But it may take decades for the new models to completely replace the traditional ones.
Another solution is to develop modern public transportation systems and restrict the use of private cars. If the price of petrol rises constantly and the public vehicles are efficient and convenient enough, most people will not drive private cars. On the whole, the elimination of air pollution needs the co-efforts from the government and the public. This problem will be solved only with the help of science and technology.
Traffic jam is a growing problem in our cities and it is becoming more and more serious as the city’s a result of traffic growing,the city’s pollution is growing, in some point,we can say it is a big soruce of pollution in cities.
The Cars play an important role in modern society. But they are also responsible for a good part of air pollution in big carbon dioxide is the outcome of transportation and it seriously cause the greenhouse effect.
As we know,the sulfur dioxide and nitric oxide are also making by this two kinds of gas play more important role in city people, especially children and elderly people, with breathing problems, polluted air can be very harmful, sometimes even fatal.
In a word ，when you enjoy all the conveniences that the city has to offer, you are paying a price also because the city is more polluted and we have to say traffic is a big source of pollution in cities.
The world we live in is becoming more and more intolerable because of environmental destruction. Bird flu and Sars are two typical examples that environmental destruction may threaten our life. Besides, forest destruction ， water and air pollution result in decrease of Planting land and unpleasant weather.
Serious as the problem seems, we can come up with some measures to deal with it. First of all, the authorities should adopt the policy of "sustainable development"， and laws concerning environmental protection should be put into effect and enforced strictly just as our government has been doing.
What s more, every citizen should realize the seriousness of the problem and make concerted efforts to protect our environment. In addition, planting trees helps improve and beautify the environment.
Harmony with the environment is that we live in on Earth, who is a natural son, and not only to natural persons as the conqueror, as we all know, there is only one earth and the mountains on Earth, the animals. Plant human cells, if it damaged, destroyed nature organizations, to the eradication of mankind. Therefore, the environment must be linked with social ethics, character education and practice acts as an important element of it. Everyone must fulfil its responsibilities and obligations to protect the environment.
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