1. The Environmental Performance Index (EPI)
2. Global Footprint Network
3. Beheshti, Hamed (2011) The prospective environmental impacts of Iran nuclear energy expansion, Energy Policy, Volume 39, Issue 10, October 2011, PP 6351–6359.
4. Cagaptay, Soner and Otun, Altay (2012) Flooding Out Terror? Turkey's Ilisu Dam Project, Washington Institute for near east policy, May 3, pp 1-2.
5. Lewis, Gary (2014) Challenges to and from the Environment in Iran, Iran Heritage Foundation and Persian Wildlife Heritage Foundation Symposium, Royal Geographical Society, London, 18 January 2014.