the proposition that natural areas need protection from the destructive actions of people iswidely accepted. this paper examines iran’s e-society attitudes and capital towards biodiversity conservationand evaluates economically iran’s national parks (nps). 2,121 respondents answered an online questionnaire conducted in summer 2012. the majority of respondents had visited one of iran’s nps. almo...

background and objective : to resource allocating at national levels as results of productivity, cost calculation helps to determine the size of the problem and revealed cost benefits of injury prevention and it can also ensure the better resource using and cost benefit assessment. this study was conducted to determine the method of calculating road traffic injuries cost. materials and methods:...

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abstract researches of preservation valuation of natural resources and environment were done in order to create necessary awareness for making optimal decisions in the field of the ways of economic management of these resources and helping to establish sustainable regional development strategy. in this study, preservation value of lilium ledebourii estimated using single bounded dichotomous cho...