At present, the number of cars in the world has exceeded 600 million, and every thousand people in the world have 1 10 cars. The number of cars in the world is increasing at the rate of 30 million every year. The number of cars in China has exceeded 6,543,800,000, and it is increasing by 654.38+00% every year. So many vehicles bring convenience and comfort to our life, but also bring great problems and pressures to the environment and road construction. Road construction will inevitably occupy a large number of land and forests on which human beings depend for survival, and it will also bring immeasurable harm to human beings on environmental issues.

In the case of few vehicles, the self-purification ability of the atmosphere can still dissolve the toxins discharged by vehicles. However, at present, traffic jams are commonplace, and the convenience, comfort and efficiency that cars should have are gradually offset by the congestion caused by too many vehicles. A "car accident" has been formed.

Scientific analysis shows that there are hundreds of different compounds in automobile exhaust, among which pollutants are solid suspended particles, carbon monoxide, hydrocarbons, nitrogen oxides, lead and sulfur oxides. The harmful exhaust gas emitted by a car in a year is three times larger than its own weight. At the same time, cars are constantly consuming the resources of the earth. For example, the fuel consumption of motor vehicles has become a bottomless pit that ruthlessly devours oil resources. At present, the gasoline used by automobiles accounts for about 1/3 of the global gasoline consumption.

While cars consume a lot of resources, their exhaust gas will seriously affect human health. Carbon monoxide in automobile exhaust combines with hemoglobin in blood 250 times faster than oxygen. Therefore, even if a small amount of carbon monoxide is inhaled, it may cause terrible hypoxia damage to people, from dizziness and headache to permanent damage to brain cells. Nitrogen, oxygen and hydroxide can cause irritating reactions in susceptible people, such as eye diseases and laryngitis. Benzopyrene contained in nitrogen and hydrogen compounds in automobile exhaust is a carcinogen. It is a highly dispersed particle, which can be suspended in the air for several days and nights after being inhaled by the human body and cannot be discharged. When it accumulates to a critical concentration, it will stimulate the formation of malignant tumors.

1943, residents of Los Angeles, USA, found that there was a layer of white fog in the air, sometimes yellow-brown, which stimulated human eyes to cry, and the fog became more and more serious. It was not until 10 years later that people found the real culprit-the car. There were two photochemical smog incidents in Los Angeles at 1955 and 1970. In the former, more than 4,000 people died of five senses poisoning and respiratory failure, while in the latter, 3/4 people in the city fell ill. From May to 10 every year, under the strong sunlight, the exhaust gas emitted by automobiles forms photochemical smog, which causes eye diseases, laryngitis and headaches, reduces atmospheric visibility, and increases traffic accidents and plane crashes. At present, considerable achievements have been made in controlling automobile exhaust, but the rapid growth of its quantity makes automobiles still the main source of urban air pollution. It is reported that photochemical smog pollution has also appeared in some big cities in China in recent years.

Cars pollute the atmosphere and also cause noise pollution to the surrounding environment. In 200 1 year, traffic noise pollution accounts for 20. 1% of the total environmental noise, and the proportion of noise in densely populated areas is much larger than this. China has a large population. With the development of economy, more and more people own private cars, which undoubtedly poses a great challenge to the air quality of the city. In this regard, governments all over the country have introduced relevant measures to solve this problem. For example, the policy of single and double number travel and the policy of bus ticket price reduction implemented in Beijing and other places are all aimed at encouraging citizens to choose more public transport. At the same time, the fuel of cars has been consumed excessively, and the reduction of private cars is to save energy. Take Britain as an example, about 1/4 of carbon dioxide emissions come from transportation, and road transportation accounts for the vast majority. Therefore, a better way to protect the environment is to use public transportation. It is suggested that you can take the subway and bus, and you must try not to drive or drive less private cars. If you live within 5 kilometers from your work place and have a bus stop, it will save you more time by bus than by driving to work.

China has a large population and a small population. If the transportation system centered on cars, especially private cars, as in the United States, it will occupy cultivated land and aggravate overpopulation, which will only bring disaster to most people. Advocating public transport is of great benefit to people all over the world. Faced with the traffic jam and serious pollution in the city, people have to turn around and choose public transportation again. The research shows that the road area ratio occupied by buses and cars to complete the same trip is1∶ 7; And a subway or light rail can solve the trip of 500 ~ 600 people at the same time, which is equivalent to reducing the use of 125 ~ 150 cars. Therefore, under the current huge traffic pressure, priority should be given to large-capacity and high-efficiency public transportation.

Environmental slogan

Green travel, bus priority.

Green traffic starts with me.