of the market of this product throughout the country , the ground has been prepared for the export of this product . according to sedav sima news agency, the general directorate of environmental protection of ilam says that the percentage of production and industrial units in ilam province use clean fuel. according to the clean air law, all production units with they should use the approved standard fuel, which is the most available in the province, natural gas, natural gas, a clean and affordable fuel that has less risks for the environment than other fossil fuels, compared to other fossil fuels, natural gas fuel is composed of carbon compounds and nitrogen compounds. google puts less into the environment, so it is considered among clean fuels and it can reduce the risks caused by fossil fuels, which are the same as global warming and the research phenomenon and for human health. approved that based on that production and industrial units that use liquid fuel should be connected to gas. on the other hand, according to article 13 of the clean air law, all industrial and production units must use standard and approved clean fuel, an issue that has been implemented in ilam province for more than