sustainable city

What is Sustainability?

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Contrary to popular belief, sustainability is not solely about maintaining environmental quality. Rather, it is a systems way of thinking that emphasizes the need to focus on interactions between humans and their environments. A systems way of thinking prioritizes the understanding that one action within the system can influence another part of the system, shifting the perspective from separate and competing to interconnected and complementary. 

"Environments" does not only mean the physical natural world around them, but also includes societal position, economic ability, living conditions, etc. Sustainability stands by the right to health whereas health is not merely the absence of disease, but includes physical, mental, and social well-being. In practice, sustainability encompasses human and ecological health, social justice, and secure livelihoods for all generations, now and in the future. 

Sustainability requires moving beyond a focus on individual behavior towards a wide range of social and environmental interventions and their impact.  All sectors must recognize that the well-being of people, places, and the planet are interdependent. An interdisciplinary approach is vital to build effective relationships and collaborations to promote sustainable knowledge, action, and understanding locally and globally. 

In conclusion, sustainability can be summarized by focusing on the three E’s (or three P’s): 

Environment (Planet) focuses on ensuring a healthy natural world that is able to maintain its natural processes without much intervention by humans.

Equity (People) refers to a society in which individuals are given relatively equal opportunities such that they can meet their needs and live a healthy lifestyle, both physically and mentally.

Economy (Prosperity) is centered around providing all individuals with economic opportunity so that they have a good quality of life and can maintain that quality over a long period.

Sustainability Definitions

To pursue sustainability is to create and maintain the conditions under which humans and nature can exist in productive harmony to support present and future generations. - US Environmental Protection Agency

Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs. -  UN World Commission on Environment and Development

An inclusive way, encompassing human and ecological health, social justice, secure livelihoods and a better world for all generations. - Association for the Advacement of Sustainability in Higher Education

The need to ensure a better quality of life for all, now and into the future, in a just and equitable manner, whilst living within the limits of supporting ecosystems. - Julian Agyeman, Robert Bullard, and Bob Evans


venn diagram of 3 E's  Three Ps