Abnormal weather in recent years, declining air quality, urban air turbidity, filled with smoke, dust and particles, serious when even affect vision, people walking in the street can only see a few feet, exhaust gas is more is one of the culprit causing respiratory allergies. The Asian development bank and tsinghua university jointly issued earlier, called the law of the People's Republic of China state environmental analysis report pointed out that the global top 10 cities, China has accounted for seven. According to world bank data, the current the economic loss caused by air pollution in China is at least equal to 1.2% of GDP.

China's urban complex pollution reasons, one of the culprit is the road full of heavy trucks and old cars. A five to ten years of car, ten times the pollutant emissions is a new car. China vehicle number up to 92 million, only 5.7% of vehicle motor vehicle emission standards accord with a country the fourth stage, needs to be improved.

Excessive emissions have direct relationship with the body weight, body is heavier, the more fuel consumption, exhaust emissions also more. To fundamentally solve the problem of air pollution, is the inevitable choice of the future automobile lightweighting trend.

Automobile lightweight, it is on the premise of ensure the strength and security of the car, as far as possible to reduce vehicle weight, thereby reducing fuel consumption, and emissions reduction targets. According to the data provided by the aluminum association, general motors each 10% reduction in weight, the fuel consumption can be reduced by 6% to 8%. Car each reduce overall weight 100 kg, per hundred kilometers oil consumption can reduce 0.3 to 0.6 litres. At present, due to the need of environmental protection and energy saving, Europe and the United States, and other car makers are stepping up its development of aluminum alloy car, have a producer has aluminum alloy car, not only environmental, but also because of the strength of the aluminum alloy YouSheng stainless steel, so the degree of safety, car inner outer have considerable appeal. With aluminum alloy instead of steel, however, can make car production costs rise, so the available now amount of aluminum more most of car positioning in the high-end market.

The density of aluminum is about 1/3 of the steel, is the most widely used lightweight materials. Production of automobile products in the United States, for example, in 1982, each vehicle with aluminum quantity is about 62 kg, 1998 up to 100 kg, current aluminum consumption about 150 kg per car, the number is rising orbit. The application of aluminum processing products for car towards lightweight, also a car, in order to manufacture is used aluminum alloy steel body 16% lighter and less emissions, pollution levels drop. With a 5.5 tons of half trailer truck, for example, if the two tons of aluminum alloy is adopted in production, run 250000 kilometers each year, 60% of full goods, 40% of empty cases, would save 2400 liters of gasoline a year, at the same time reduce 6 tons of carbon dioxide emissions. The environmental benefits of aluminum is self-evident.