This project will help directly to the implementation of a governmental disposition to diminish air pollution, through the analysis and measurement of combustion gases, it is a recently issued law and will be a citizen?s duty to make car tests to circulate in the country. The activity was supported by a Swiss agency and the SGP will contribute to spread the about the goodness of this laws. NSC decided to contribute with 30% of the requested funds and ATAMEGUA accepted with the compromise to collect the rest with associates and other donors. Objectives for this project are: to establish a car?s gases testing workshop at Quetzaltenango, to promote understanding and use by the general public of the services to have cars under control on this issue, to coordinate with local authorities that will enforce the law to have effective control on this issue, to replicate the experience in two additional places by the end of the first implementation year.