What do you mean by traffic jam?

Pronunciation: d incarnation

Note: Vehicles cannot pass smoothly due to narrow roads, too many vehicles or other human factors.

Traffic jam is a disease. With the development of the city, this disease is becoming more and more serious. In the rolling traffic, pain and happiness, congestion and thinking.

Traffic jams are caused by narrow roads or too many vehicles, which leads to traffic jams for a long time. Traffic congestion has become a common problem in modern society, especially in developing countries, which has seriously affected people's work efficiency and social development. A traffic jam culture and people's attention and research also extend from traffic jams.

harm

When there is traffic jam, the more serious problem is automobile exhaust pollution. Wei, an academician of China Academy of Sciences and a researcher at China National Environmental Monitoring Center, said that when a vehicle stops and starts, the engine burns incompletely, which will produce a large number of pollutants, including a large number of fine particles with a diameter of ≤2.5 microns, which can easily enter the lungs with breathing. Studies have found that exhaust pollutants not only irritate eyes and lungs, but also cause cough, asthma and bronchitis. And patients with respiratory diseases who go to the hospital also have "variation". In addition, automobile exhaust also contains harmful substances such as benzene and toluene, which not only irritates the respiratory tract, but also is a carcinogen. The University of Naples in Italy also found that automobile exhaust seriously affected male fertility.