In ecology, sustainability (from sustain and ability) is the property of biological systems to remain diverse and productive indefinitely. Long-lived and healthy wetlands and forests are examples of sustainable biological systems. In more general terms, sustainability is the endurance of systems and processes. The organizing principle for sustainability is sustainable development, which includes the four interconnected domains: ecology, economics, politics and culture. Sustainability science is the study of sustainable development and environmental science.
Wikipedia on Sustainability:
Sustainability is also about how you want to/ are willing to contribute:
I want to contribute by being knowledgeable about Being Better Better: https://www.amazon.com/Being-Better-Living-Systems-Intelligence/dp/1507866208
as i.e. described by Hämäläinen, Jones and Saarinen (2014) «Systems Intelligence extends the concepts of Emotional and Social Intelligence. Systems Intelligence is the innate yet learnable capacity through which we engage with the diverse systems in our lives.»