The Earth Day flag includes a NASABlue Marble photo.
Sustainability means that a process or state can be maintained at a certain level for as long as is wanted.
One common definition of sustainability was from the Brundtland Commission, led by the former Norwegian Prime Minister Gro Harlem Brundtland. The Commission defined sustainable development as development that "meets the needs of the present without compromising the ability of future generations to meet their own needs." So sustainability seeks to consider the present with the future in mind.
Sustainability often relates to the connection between economic, social and environmental aspects of human society, as well as the non-human (e.g. animal or plant) environment. Some overarching principles of sustainability include minimalism, efficiency, resilience and self-sufficiency. Sustainability is key to the United Nations Sustainable Development Goals, the SDGs.
Dean, J. W. (2006). Conservatives Without Conscience. New York: Viking Penguin.
Ekins, P. (Ed.). (1986). The Living Economy. London: Routledge and Kegan Paul.
Hargroves, Karlson; Smith, Michael H. (2005). The Natural Advantage of Nations: Business Opportunities, Innovation, and Governance in the 21st Century. Routledge. ISBN1-84407-121-9.
Hawken, Paul, Lovins, Amory and Lovins, L. H. 1999. Natural Capitalism: Creating the Next Industrial Revolution, Earthscan, London (Downloadable from www.natcap.org)
International Institute for Sustainable Development (1996) Global Tomorrow Coalition Sustainable Development Tool Kit: A Sample Policy Framework, Chapter 4Archived 2015-11-06 at the Wayback Machine.
Jarzombek, Mark. "Sustainability—Architecture: between Fuzzy Systems and Wicked Problems," Blueprints 21/1 (Winter 2003), pp.6–9; and LOG 8 (Summer 206) 7-13.
Lane, R. E. (1991). The Market Experience. New York: Cambridge University Press.
Marks, N., Simms, A., Thompson, S., and Abdallah, S. (2006).The (Un)happy Planet Index. London: New Economics Foundation. Downloadable from www.neweconomics.org
McDonough, W. & Braungart, M. (2002). Cradle to Cradle. North Point Press
Nelson, E. H. (1986). New Values and Attitudes Throughout Europe. Epsom, England: Taylor-Nelson.
Raven, J. (1995). The New Wealth of Nations: A New Enquiry into the Nature and Origins of the Wealth of Nations and the Societal Learning Arrangements Needed for a Sustainable Society. Unionville, New York: Royal Fireworks Press; Sudbury, Suffolk: Bloomfield Books.
Richardson, B.J. and Wood, S. (eds) (2006). Environmental Law for Sustainability: A Reader, Hart Publishing, Oxford.
Robèrt, Karl-Henrik. (2002). The Natural Step Story: Seeding a Quiet Revolution. Gabriola Island, BC: New Society Publishers.
Shah, H., & Marks, N. (2004). A Well-being Manifesto for a Flourishing Society. London: New Economics Foundation.
Steffen, Alex (2006). Worldchanging: A User's Guide to the 21st Century. Abrams, New York.
Trainer, F. E. (Ed.). (1990). A rejection of the Bruntland Report. International Foundation for the Development of Alternatives Dossier, 77, May-June, 71-85.
Unruh, G. (2000). Understanding Carbon Lock-in, Energy Policy, Volume 28, Issue 12, October, 817–830.
Unruh, G. (2002). Escaping Carbon Lock-in, Energy Policy, Volume 30, Issue 4, March, 317-325.
Yankelovitch, D., Zetterberg, H., Strumpel, B., Shanks, M., et al. (1983). Work and Human Values. New York: Aspen Institute for Humanistic Studies.
Young, Lincoln; Hampshire, Jonathan (2000). Promoting Practical Sustainability. Quality Assurance Group, Australian Agency for International Development. ISBN978-0-642-45058-6.