the purpose of this study is to study the role of environmental determinants in entrepreneurship in the public sector. this is an applied and descriptive-correlation study. the statistical population is tehran municipality's employees and clients. a sample of 220 municipal employees and a sample of 200 citizens were selected to evaluate the role of environmental factors in entrepreneurship...

the 6th national population and housing census was carried out from october 28 to november 17, 2006 in which three different questionnaires were used. question number 55 of the 3rd questionnaire asked about housing units sewage disposal. this paper studies and analyzes the answers to the mentioned question in regional and national levels. assessment of housing units sewage disposal conditions s...