according to the announcement of australia's flinders university science and technology foundation. in this method with the combination of a kind of mineral pigment and reactive gold atomic clusters is obtained. researchers say: ultraviolet light emitted from this chemical reaction can break down toxic chemicals in the afterglow. this method can be used in the textile, food and cosmetic industry, where industrial dyes are used, for the first settlement of wastewater. the end of the national location-based plan by the end of the 13th government, according to the ceo of iran's national post company, based on this plan , which is to be used in the housing population census of 1405, places with a postal code will be eligible for geographic location, and this location is easily post can be seen on the map. we are currently from 143 cities in the country. and we have a commitment to complete the remaining 300 cities by the national communication day, which is may 28 this year, god willing. this is one of our cities . out of the 40,000 villages we have in the whole country , there are more