golalizadeh, the ease of obtaining a technical mine sheet is available in small cities. connoisseurs of used cars from big cities visit these cities. in case of strict implementation of technical inspection, air pollution in big cities will be reduced by 10 to 15% . the clause of the clean air law deals with the technical inspection of cars in order to control their emissions. they should have a technical subject that has an effective role in reducing the pollution of big cities. contribution of mobile resources to emissions allanda, especially suspended particles less than a micron, varies from 40 to 70 from bese to karanshahr. in the complex, if they do their work as well as the technical examination centers. 10 to 12 percent leads to a reduction in the amount of dust emissions. with 850 technical examination centers for light heavy vehicles in the country. about 49 to 50 percent of cars in the country. not going for the technical inspection, if it wasn't for this compulsion, maybe i would have told the person behind my back that they are leaving tomorrow, but now i am