The value-added model of the supply chain of petrochemical industries with a sustainable development approach by ali amiri, seyed abbas heydari, vahidreza Mirabi

“…Its sustainability and performance have attracted the attention of the world (companies and researchers) since 1992, which coincides with the Rio de Janeiro summit (Figge et al, 2002). …”
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Presenting a model of ecotourism and sustainable tourism development with an emphasis on foreign exchange and economic development of Qeshm Island by Naser Rajabi, Vahid Reza Mirabi, Khosro Moradi Shahdadi

“…This type of tourism emphasizes social and environmental responsibility and emphasizes the direct relationship with local communities and the protection of natural resources (Fennell, 2014).Sustainable DevelopmentDevelopment and sustainability is one of the relatively new concepts in the world development literature, and was first used in the United Nations Summit under the title of Human Environment in Stockholm in 1372. …”
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