英语翻译Today,in modern civilization,the car has become an indis

英语翻译
Today,in modern civilization,the car has become an indispensable means of transport.Since the birth of the first vehicle since 1886,it brought to people's lives and greatly facilitated the work,but also has become one of the pillars of modern material.However,we should also note that the rapid development in the automobile industry,and maintain the continuous increase in the production of motor vehicles,the air pollution has brought automobile,automobile exhaust pollution.The main hazard is automobile exhaust to form smog.1943,Los Angeles,California in the United States,2.5 million cars burning off 1,100 tons of gasoline per day.After the combustion of hydrocarbons,such as gasoline ultraviolet rays of the sun under a chemical reaction,forming a light blue smoke,most people suffering from the city jealous,headache disease.Later,it was known as photochemical smog of this pollution.Los Angeles twice in 1955 and 1970 occurred photochemical smog,and more than 400 former featured poisoning,respiratory failure and death,the latter a city of three-quarters of the sick.This is the history to be called "the world's eight major hazard" and "20th Century 10 environmental hazards," Los Angeles smog in one of the incidents.It is a profound understanding of these incidents to the people of the dangers of automobile exhaust.200 vehicle emissions of organic compounds,including benzene,a highly carcinogenic polycyclic aromatic ingredients,the human body is a long-term cumulative effects.Medical studies have revealed that a large number of benzene vapor inhalation a short period of time can cause life-threatening acute poisoning,the long-term repeated exposure to low levels of benzene can cause chronic poisoning.Data show that PM10 concentrations increased with a series of negative effects on human health closely

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