can encourage people to organize the dry waste through the incentive packages that they see in qbooz garbashman. but due to the fact that before they look at our economic activity, i say that environmental should be given, that is, public awareness, the first part of which is social and cultural exchanges in the municipality or social and cultural organizations with titles. in this way, in the whole country, those who are active in the field of shahria , they have the best position because they express the culture of the people from the origin of garbage. it is separated and handed over to the city official, not that sometimes the same things happen and lead to a thousand and one issues . the short-term consequences of contracts. a short-term contract of one or two years is not profitable for the private sector that wants to make the necessary investment. the length of the contracts should be 10 to 20 years in order to be economical for the private sector in the fields of investment and culture. mohammad ali abdoli, university professor. management after all its steps from the beginning to the