Keamanan lingkungan mempelajari ancaman peristiwa lingkungan terhadap manusia, masyarakat, atau bangsa. Kajian ini berfokus pada dampak konflik manusia dan hubungan internasional terhadap lingkungan serta bagaimana masalah lingkungan bergerak melintasi batas negara.

Proyek Milenium Perserikatan Bangsa-Bangsa menyusun definisi keamanan lingkungan dan membuat definisi terpadu.

Keamanan lingkungan adalah kelayakan lingkungan bagi makhluk hidup dengan tiga sub-elemen:

• mencegah atau memperbaiki kerusakan lingkungan akibat militer,
• mencegah atau menanggapi konflik lingkungan, dan
• melindungi lingkungan karena mengandung nilai moral.

Keamanan lingkungan mempertimbangkan kemampuan manusia, masyarakat, atau bangsa menghadapi risiko lingkungan, perubahan atau konflik, atau keterbatasan sumber daya alam. Misalnya, perubahan iklim dapat dipandang sebagai ancaman terhadap keamanan lingkungan. Aktivitas manusia memengaruhi emisi karbon dioksida, perubahan iklim dan lingkungan kawasan dan global, dan perubahan hasil panen. Hal ini dapat memicu kelangkaan pangan yang kemudian menimbulkan perdebatan politik, ketegangan suku, dan kerusuhan masyarakat.^[1]

Keamanan lingkungan merupakan konsep penting dalam bidang hubungan internasional dan pembangunan internasional.

• Brown, L. 1977. "Redefining Security,” WorldWatch Paper 14 (Washington, D.C.: WorldWatch Institute)
• Ullman, R.H. 1983. “Redefining Security,” International Security 8, No. 1 (Summer 1983): 129-153.
• Westing, A.H. 1986. “An Expanded Concept of International Security,” In Global Resources and International Conflict, ed. Arthur H. Westing. Oxford: Oxford University Press.
• Myers, N. 1986. “The Environmental Dimension to Security Issues.” The Environmentalist 6 (1986): pp. 251–257.
• Ehrlich, P.R., and A.H. Ehrlich. 1988. The Environmental Dimensions of National Security. Stanford, CA: Stanford Institute for Population and Resource Studies.
• Svensson, U. 1988. “Environmental Security: A Concept.” Presented at the International Conference on Environmental Stress and Security, the Royal Swedish Academy of Sciences, Stockholm, Sweden, December 1988.
• Mathews, J.T. 1989. “Redefining Security,” Foreign Affairs 68, No. 2 (Spring 1989): 162-177.
• Gleick, P H. “The Implications of Global Climate Changes for International Security.” Climate Change 15 (October 1989): pp. 303–325.
• Gleick, P.H. 1990c. "Environment, resources, and international security and politics." In E. Arnett (ed.) Science and International Security: Responding to a Changing World. American Association for the Advancement of Science Press, Washington, D.C. pp. 501–523.
• Gleick, P.H. 1991b. "Environment and security: The clear connections." Bulletin of the Atomic Scientists. Vol. 47, No. 3, pp. 16–21.
• Homer-Dixon, T.F. 1991. “On the Threshold: Environmental Changes as Causes of Acute Conflict, International Security 16, No. 2 (Fall 1991): 76-116
• Romm, Joseph (1992). The Once and Future Superpower: How to Restore America's Economic, Energy, and Environmental Security. New York: William Morrow & Co.  ISBN 0-688-11868-2
• Romm, Joseph J. 1993. Defining National Security: The Nonmilitary Aspects (New York: Council on Foreign Relations)
• Levy, M.A. 1995. “Is the Environment a National Security Issue?” International Security 20, No. 2 (Fall 1995)
• Swain, A. 1996. "Displacing the Conflict: Environmental Destruction in Bangladesh and Ethnic Conflict in India." Journal of Peace Research, 33(2), 189–204.
• Wallensteen, P., & Swain, A. 1997. "Environment, Conflict and Cooperation." In D. Brune, D. Chapman, M. Gwynne, & J. Pacyna, The Global Environment. Science, Technology and Management (Vol. 2, pp. 691–704). Weinheim: VCH Verlagsgemeinschaft mbH.
• Terminski, Bogumil. 2009. “Environmentally-Induced Displacement. Theoretical Frameworks and Current Challenges”, CEDEM, Université de Liège.
• Dabelko, G.D. 1996. “Ideas and the Evolution of Environmental Security Conceptions.” Paper presented at the International Studies Association Annual Meeting, San Diego, CA, April 1996.
• Kobtzeff, Oleg. 2000. “Environmental Security and Civil Society”, in- Gardner, Hall, (ed.) Central and South-central Europe in Transition, Westport, Connecticut: Praeger, 2000, pp. 219–296.
• Dodds, F. Pippard, T. 2005. (edited) "Human and Environmental Security: An Agenda for Change, London. Earthscan.
• Dodds, F. Higham, A. Sherman, R. 2009. (edited) "Climate Change and Energy Insecurity: The Challenge for Peace, Security and Development", London. Earthscan
• Djoghlaf, A. Dodds, F. 2010 (edited) "Biodiversity and Ecosystem Insecurity: A Planet in Peril", London, Earthscan
• Dodds, F. Bartram, J. 2016 (edited) "The Water, Food, Energy and Climate Nexus: Challenges and an agenda for action", London, Routledge

• Perubahan iklim dan keamanan nasional
• Peristiwa tubrukan

• Ecological and Nontraditional Security Challenges in South Asia by Dennis Pirages, Farooq Sobhan, Stacy D. VanDeveer and Li Li (NBR Special Report, June 2011)
• Schulz-Walden, Thorsten (2013): Anfänge globaler Umweltpolitik. Umweltsicherheit in der internationalen Politik (1969–1975), Oldenbourg Verlag, München, ISBN 978-3-486-72362-5 [Rezension bei: http://hsozkult.geschichte.hu-berlin.de/rezensionen/2014-1-019]

• Environment, Cooperation, and Conflict (ECC) Factbook - A database including analyses and info graphics on conflicts with an environmental dimension; part of the ECC Platform, supported by the German Federal Foreign Office
• Institute for Environmental Diplomacy and Security, University of Vermont, USA
• Monthly International Environmental Security reports by the Millennium Project Diarsipkan 2016-04-09 di Wayback Machine.
• The Institute for Environmental Security
• Essay on environmental security Diarsipkan 2007-01-24 di Wayback Machine. by Steve McCormick of The Nature Conservancy
• Environmental Change & Security Program at the Woodrow Wilson Center, directed by Geoffrey Dabelko Diarsipkan 2011-06-05 di Wayback Machine.
• Environmental Security and Peace Program Diarsipkan 2008-05-09 di Wayback Machine. at the United Nations mandated University for Peace
• Human and Environmental Security: An Agenda for Change edited by Felix Dodds and Tim Pippard, London Earthscan
• Environment and Security Program of the Pacific Institute, directed by Peter Gleick
• Stakeholder Forum for a Suatinable Future Diarsipkan 2007-07-12 di Wayback Machine.
• UMass Professor Peter M. Haas defends a skeptical view on Environmental Security
• Environment and Security Initiative Diarsipkan 2011-04-25 di Wayback Machine. active in South Eastern and Eastern Europe, Southern Caucasus and Central Asia
• Environmental Security Database Diarsipkan 2012-07-16 di Wayback Machine.
• [1] Diarsipkan 2006-05-13 di Wayback Machine.
• The Millennium Project' Monthy reports on Emerging International Issues of Environmental Security Diarsipkan 2016-04-07 di Wayback Machine.
• [2]