1. METAP‐The World Bank (2003),High Level Meeting on Economic Tools for Environmental Sustainability, June 25‐27, Beirut.
2. Pillet, G., Zein, K., Carrara, A. and Benyahia, N. (2004),Economic Analysis of the Environmental Costs and Benefits of the Cement Industry in Syria, Ecosystem‐SBA/ SDC and GOCBM, Damascus, p. 40.
3. Scitovsky, T. (1954), “Two concepts of external economics”,Journal of Political Economy, April.
4. BC Berlin (2004),Tehran Solid Waste Management Project: Landfill Preparation Study, Final Report, Organization for Waste Recycling and Composting (OWRC).