In the impression of many people, the automobile industry in Europe, the United States and Japan is extremely developed, and the models produced are also efficient, environmentally friendly and energy-saving. However, this is only limited to the new cars produced in recent years, while those used and old cars exported are of poor quality and seriously polluted, and even criticized by the United Nations. Recently, the United Nations Environment Programme (UNEP) released its first research report on the global second-hand car market, which is named “second hand cars and the environment: a global overview of second hand light vehicles: flow, scale and regulations”. The report points out that used cars, vans and minibuses exported from Europe, the United States and Japan to developing countries are generally of poor quality, and the order of millions of vehicles not only aggravates air pollution, but also often involves traffic accidents. The report shows that from 2015 to 2018, the world exported 14 million second-hand light vehicles. Of these, 80% went to low – and middle-income countries, and more than half to Africa. < / P > < p > based on an in-depth analysis of 146 countries, the report found that two-thirds of them have “weak” or “very weak” import control policies on used cars. The lack of effective standards and regulations is the main reason for the dumping of abandoned, polluting and unsafe vehicles, according to EPA executive director Anderson. Developed countries must stop exporting vehicles that have failed their environmental and safety inspections and are no longer suitable for road use, while importing countries should introduce stricter quality standards. In addition, inferior second-hand cars also lead to more road traffic accidents. African countries such as Malawi, Nigeria, Zimbabwe and Burundi, which implement “very weak” or “weak” second-hand car laws, have higher road traffic fatality rates. However, obviously, because of the economic differentiation, these used old cars, even if they have some disadvantages, will still be welcomed by many local people if they are cheap enough. < / P > < p > and this kind of used old cars, only when prohibited from the source of exporting countries, can be completely controlled to flow into the trading market or drive on the road again. Global Tech